Alberta separation movement criticized by ~~business groups~~ everyone with at least two brain cells
FTFY
The obvious answers are the games we endlessly replayed historically: Mario Kart, Goldeneye (VS mode), Halo (VS), Smash Bros.
If you specifically want ones on PC, I'd suggest Starcraft, Age of Empires, and probably Counter Strike (I wasn't into that one, but it had a huge following).
Many board games fit the bill as well. Codenames (physical or online at horsepaste.com) comes to mind, and another commenter also mentioned chess.
Basically any games that were made before endlessly grinding became a thing (yep, that's only been a thing for a decade or two).
Ooh, or my other trope: be a cleric with heavy armor and a shield. On your first turn in combat, walk out in front of everyone, cast Shield of Faith, and take the Dodge action. As a free action, yell "come at me, fucknuts!" If you can pick up the Shield spell, you're mostly invulnerable, and it's pretty much viable at level 1.
My personal favorite aspect with respect to combat is, "I look around, what objects and furniture are in the room?" Then proceed to use that stuff in combat. Long rug? I'll attempt to trip the opponent by pulling it up. Chandelier? Yeah I'll throw a hand axe and try to break that chain. Some DMs thrive off of it, some are put off.
If you feel most familiar with Debian, I recommend looking at Mint. It has great compatibility and is otherwise easy to use, and it handles GPUs well (including Nvidia). In terms of hardware, I'll agree with the others here--used is the way to go, you'll get a lot more for your money than buying new.
That being said, you can also look for clearance and/or refurbished PCs. This one would probably be powerful enough.
One thing to understand about web design is that there can be multiple pieces, depending on what you need the site to do.
At the least, you'll need to learn about HTML and CSS - this is the basic structure of how web pages are presented. In theory, a very simple website can just use these two.
It's also common to integrate Javascript, for things like dynamic actions on the page that can't be handled by the HTML/CSS (once you learn those two, you'll have a better idea of their limitations and what JS can do for you).
All of those three (HTML/CSS/JS) are "front-end", which means they all do things in the user's browser. You can also add "back-end" components, which run on another computer on the internet, and often generate some of the HTML. This includes languages like PHP, Python, Ruby, and Javascript (yeah, it can be used here too, which can be confusing). Back-end components are for things like databases.
If this is all new, I recommend looking at freecodecamp.org - they have a great program that goes through each of these pieces in a logical order.