If you're not doing anything crazy, there's no reason linux should be any harder to use than Windows.
Once you're up and running, daily life will be pretty straightforward.
Plenty of great advice in the other posts that I won't rehash. One thing I didn't see mentioned is using a live boot to try out linux. You can basically run it off a USB stick before you install it to get a feel for what it's like. Most "beginner friendly" distros will have tutorials on how to create the live disk. Example for Pop!_OS: https://support.system76.com/articles/live-disk/
I was really looking forward to another Arkham style game. Sucks for me that they decided to go in another direction. Doubly bad when that direction (live service co-op) is one I couldn't enjoy even if I wanted to (and to be clear, I don't).