I can speak to a few of your questions. I've been fully on Linux, both my laptop and gaming PC for two years now.
Gaming - I use Steam for all of my games, and have had few issues. Steam uses Proton to allow non-native games to run, and it happens all within the Steam client. New Proton versions update within Steam just like your games. I've run across a few games that wouldn't launch or would CTD, but those are few and far between and similar to my experience in Windows.
Sample of games I've played without issue:
Star Wars Jedi: Survivor
Horizon: Forbidden West
Helldivers 2
Red Dead Redemption 2
Dwarf Fortress
Kingdom Come Deliverance 2
Fallout: New Vegas
Deep Rock Galactic
Sea of Stars
Factorio
I have an Nvidia 3080Ti and use the proprietary Nvidia drivers. From what I recall, the install was painless and I haven't had driver issues.
OpenOffice - I use LibreOffice, because to my understanding it is actively maintained unlike OpenOffice, and I haven't had any issues casually using it to view documents.
I use Thunderbird for my mail client and haven't had any issues setting it up or using basic functionality. It works just as well as it did under Windows.
I installed VS Code or one of the foss alternatives, can't remember which, and haven't had issues with it.
TL;DR that's really my experience with everything in Linux. Some things are a learning curve, but most stuff just works. I'm also not a tinkerer. I just wanted an OS that works and stays out of my way and Linux has been great for that.
I struggled with depression for years and the most beneficial change I made was to put effort into developing close friendships. Having friends and family that you can talk to and share things with is immeasurably valuable.
Also, listening to other's problems helps develop your own empathetic response and it's a short step to extending that empathy to yourself. Be kind to yourself and avoid negative self-talk. You deserve better. Life is hard enough as it is.
I can't speak to the new Indiana Jones as I haven't seen it, but the issue people generally have with aging action movie stars is how unrealistic it is. See, Liam Neeson in his recent films, Robert De Niro in The Irishman, Steven Seagal, etc.
Trying to convince the audience that a 75 year old can sprint for 100m after dispatching a gang of thugs, and suffering a gunshot wound is as hard to believe as a 65 year old woman having the body and skin of a woman half her age. People value authenticity and realistic standards to some degree.
Documentary Narrator: Fortunately, our handsomest politicians came up with a cheap, last minute way to combat global warming. Ever since 2063, we simply drop a giant ice cube into the ocean now and again.
Suzie: Just like daddy puts in his drink every morning. Then he gets mad.
Documentary Narrator: Of course, because the greenhouse gasses are still building up, it takes more and more ice each time, thus solving the problem once and for all.
Found it. It's Alfred Bester's The Stars My Destination