It's my first time building a computer. I also haven't really done much PC gaming in the past 15 years, except on my Steam Deck. Actually, it is the Steam Deck that has convinced me to invest in a desktop PC with some more power. I like the Linux experience on Steam Deck and would like to stick with that if possible. I haven't used Windows in 15 years either, as I tend to use Mac OS and a bit of Linux for personal and work. Windows seems to just get worse and worse and I'd like to avoid it if possible.
https://pcpartpicker.com/list/zr2ZVW
In any case, I went with an AMD CPU because I've heard about Intel's recent corrosion issues. And, chose an NVidia GPU since I'd like to take advantage of ray tracing. I've heard the driver support can be a bit mixed on Linux, but I'm open to trying to make it work unless folks think it really is terrible. Any feedback is helpful.
Case:
The Fractal Design Define 7 without glass pane looks like a boring black box but the dust filters and noise cancelling is wonderful and it's really easy to build in. I would choose that one over the North series.
PSU:
I would try to up the Watt to at least 850W. The closer to 50% psu use the more efficient the psu is and the wattage that isn't used efficiently turns into heat.
Getting a 1000 Watt Platinum PSU would result in a cooler and quieter case, but not very budget friendly.
A stronger PSU also increases the chances of you bringing it with you into your next computer build, or being able to add a stronger GPU to the current build in the future.