The though process you're going through is the right one, and the anxiety can be common in the industry.
Since you're about to start your career my advice is that your first couple jobs will shape what you'll do in the following years. Don't try to nail the right job at first, but it will definitely helps to tell you what you like and don't. After that you'll be able to know what to look for.
After the first few years on a decent job you'll have learned much more than you possibly can in a shitty one doing hobby learning.
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The though process you're going through is the right one, and the anxiety can be common in the industry.
Since you're about to start your career my advice is that your first couple jobs will shape what you'll do in the following years. Don't try to nail the right job at first, but it will definitely helps to tell you what you like and don't. After that you'll be able to know what to look for.
After the first few years on a decent job you'll have learned much more than you possibly can in a shitty one doing hobby learning.