Advice needed about a gaming PC

I currently play games on an xbox but I'm considering getting a gaming PC. I need it to be Windows OS as I want to use a controller rather than mouse & keyboard for games, and I understand that Windows supports XBox controllers. I also would prefer a case that isn't transparent or gaudy, I just want a plain looking machine that's as compact as possible. Apart from that, I haven't a clue what specs to look for.

Any recommendations for an easy to use games PC that is powerful enough to play games like Inzoi, Fallout 4, Assassins Creed odyssey, Hogwarts Legacy, etc?