@chrastecky @InfiniteHench I'd go even further and claim "any distro that isn't just a single-person hobby project is fine".
I'd suggest to rather pick a distribution that's well maintained and has a large user-base.
For trying out Linux I'd probably suggest Linux Mint. It's a good compromise between ease of use and quality, and of course Steam (and Steam Play Proton) runs perfectly fine on it.