Sounds similar to my experience. When I first started out I wrote no tests and tried testing everything manually myself. So hang in there! It will get better with pratice.
The time savings in my experience come from three areas. We spend less time in the debugger, we avoid logical errors and bugs that can suck large amounts of time, and we only write the bare minimum amount of code needed to get the tests passing.
One extra time saving I almost forgot about, if we really spend the time refactoring it can help us make our code easier to understand, which helps others save time.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.