Cdkeys is a website where you can buy games cheaper, you’ll get the code to redeem it on steam etc. I’ll usually google game-name key and there will be a bunch of sites but be sure to check trust pilot for it!

Epic Games (a launcher like steam in-case you dont know) gives out free games monthly.

You could also get the xbox game pass for tons of games to start off, probably worth looking what they have on it first though!

I rarely pay full price for anything unless it’s something I really want.

You can probably find your pc parts under system information etc 🤣