should be fairly simple with any distro. personally, id recommend mint or something for ease of use. install steam, and you can use steam link for android (chromecast, roku, firestick, mobile), or steam link for linux (raspberry pi etc). steam has built in compatibility for windows games running on linux, and a built in streaming setup. a bit of an all-in-one solution.
you can try a steamdeck-like distro as others have suggested, but they may be less easy to learn on if youre not too familiar with linux already.
keep in mind nvidia drivers are a sore spot in linux, so if possible try to use an amd graphics card.
this is exactly my opinion on it. one of my main gripes was the text rendering. if i needed to change some text i basically had to redo all of the work on any shadow or stroke as well, not just correct a spelling mistake or whatever. very excited to check out the new version.