In the world of Linux there are many, many distributions. With all of this choice, it is understandable that a new user would be easily confused. As the Linux challenge from LTT shows there aren't a lot of good articles out there to help the new comers.
So, let's answer the question of how to pick a the right Linux distribution for you.
If you are unfamiliar, I discussed what a distribution in a previous article. Similar ideas may come up here as well.
There are three types of distributions, long term support, rolling release, and short term support (not the official name, I just decided to call them that) distributions. Short term support distributions can be a good middle ground between long term support and rolling release. Let's get into the details of each.
Long term support (LTS) distributions are exactly that, they are supported with security updates for a long time. Usually three to five years. Some server based distributions are supported for even longer. These types of distributions lock-in the application, and library versions they ship. So you will not get the latest and greatest software. But if you don't need that, and you need an extremely stable system, then this is the kind of distribution you want. The best part modern packaging systems like Flatpak is that you can still get the latest applications with a stable, LTS base operating system.
Rolling release distributions are the complete opposite of LTS distributions. They update all applications and libraries very frequently and they make sure latest and greatest software is available. This type of distribution will also have the opposite pros and cons than the LTS distributions. For example, you get the latest software but that comes at a cost of stability. There is testing that happens to make sure nothing breaks in a rolling release distro. This testing does ensure that rolling release distributions remain stable for most users. However, there will be breakages. Sometimes the distribution breaks because of a bug, other times the breakages are intentional, where some manual changes/deletions would be required for the upgrading to the latest release.
Short term support releases are the middle ground for the LTS and Rolling release distributions. This is the most common type of distribution. These types of distributions have a new release every six months or so. And generally support a new release for nine to 12 months. With this type of distribution you get a new release every six months, which contains software updates, new development and features, and these changes are generally better tested. There some distributions that keep most software updated even between six month releases. These distributions can also bet considered semi rolling release distributions. They try to capture the best of both LTS and rolling release.
What are my hardware needs/requirements?
Your hardware needs should be your top priority for picking a distribution. After all, if your hardware isn't supported by the distribution you pick, than you will not have a good time with Linux. If you have the latest/new hardware (CPU, GPU, Wifi, Sound, etc) than you need to the make sure your distribution keeps the Linux kernel, firmware, and drivers up-to-date. For this use-case, rolling releases, like Arch Linux, Manjaro, or OpenSuse Tumbleweed, usually work well. But if you looking for more stability pick a short term support distribution that keeps the Linux kernel updated between releases, like Fedora Workstation.
Most Linux distributions include a live session when you try to install them. This is the perfect time to try out everything. In the live session you will get most of the functionality you get post installation. Some installers drop you straight into the live session and then provide a shortcut to the installation application. Others provide a try or install options at the beginning. If you're wondering how you can even install a Linux distribution: I covered it in a previous article, check it out.
If the answer is yes than a rolling release, like Arch or OpenSuse Tumbleweed is the best option for you. A good alternative is a short term support distribution like Fedora Workstation, and KDE Neon are good keeping packages up-to-date in between release cycles. Otherweise, if the answer is no, than an LTS release like Ubuntu LTS, Linux Mint, or Debian are for you.
If you need to use proprietary software, specifically multimedia codecs or drivers, than your primary concern needs to be popularity. By the numbers, the most popular Linux distribution is Ubuntu. There is a big advantage to being the most popular, Ubuntu is often the first choice for support when companies are looking to support Linux. Steam was only available on Ubuntu to begin with. Although there are some sources that say it's popularity is waning. General rule for this question, is pick a distribution that has active, relatively large community.
Most mainstream Linux distributions are going to come with batteries included. Meaning you'll get a browser, office suite, audio and video players, and PDF viewer included. With Linux in general you don't even have to worry about drivers for the most part (But still make sure your hardware is compatible, see the first question). You still have a to worry about Nvidia drivers, since they are the only major hold out. Most distributions do make those drivers easy to get these days. There is either dedicated driver utility or you will be able to get straight from the software store. If you have all AMD or all Intel, you don't have to worry about drivers. So you'll be fine with most mainstream distributions, however, short term support release distributions will give you the best experience over all.
General rule for gaming is that you should have the latest Kernel and the latest display drivers. For Nvidia users, most distributions package and update their Nvidia driver some time after Nvidia's official release. So most distributions will offer you regular updates for the Nvidia driver. For AMD and Intel, the story is a little bit different, these drivers are baked into the Linux kernel and have an addition package called mesa. These two components combine to give the most updated, open-source, driver for both AMD and Intel. So you will need a distribution that keeps these two components updated on regular basis. Typically a rolling release distribution, or a short term support distribution will do the job.
Of course this is not an exhaustive list of all the questions you may have. Rather, I hope you get the idea between which type of distribution to pick for your use case. When it comes to the hundreds of the distributions out there, I would suggest to only look at the mainstream distributions if you're beginner. These include Ubuntu, Fedora, Linux Mint, Pop!_OS, OpenSuse, Manjaro, ElementaryOS, and others. When you more proficient with Linux, and would like to learn more, then you get into more involved Linux distributions like Arch, or Gentoo. For now I hope that was helpful.