People usually recommend Linux mint or some Ubuntu version. I recommend neither.
Ubuntu is a proprietary-solution-ridden piece of hot garbage that tries to hinders what you do at any chance. I use it daily for work, unfortunately.
It’s been a few years since I tried mint. It looked good and felt nice for the first few hours, after that I don’t remember what happened, it was maybe lack of configurabilità or lack of support, but I noped out very quickly and I just remember that my thoughts were “never again”.
I never tried it, but it looks like Pop!_OS might be the thing to look out for in this space.
Besides that, know that Linux is different from windows starting from its very philosophy. Keep an open mind, it can be a confusing journey for a beginner (which is why I am holding back about telling you about the many possibilities).
One thing to keep in mind is that some software that you were used to will not be available, and that you might need to look for alternatives. But as far as the things you mentioned go, these are my recommendations:
- browser: Firefox
- gaming: steam
- streaming: OBS