Back in 2020 I pointed out what were the best Linux distributions for gaming, so here's the current state and what you should go for in 2023.
The thing is: not a lot has changed since my last article. Linux is still a minefield of many different distributions for people, and it can be very confusing. There's a lot of articles out there recommending really random and outdated distributions in lists too, so here's the real thing.
Without getting bogged down into packaging issues, and just giving you the basics of "this will work just fine" — go and install Ubuntu. People will (and I expect them to) argue for others, and people are free to, but a lot of people suggest other distributions for the wrong reasons. Manjaro has too many problems both technical and management, Arch can and will break things if you don't know exactly what you're doing, Fedora is messy with NVIDIA drivers and SELinux on Fedora is a nuisance and so on. Ubuntu is still to this day, the most simple distribution of Linux to install and get gaming.
Ubuntu isn't perfect by a long shot, but it remains as my number 1 choice to suggest to people both new and old to get into Linux and get gaming. It's one of the most used on desktop by any statistic you can find, which also means troubleshooting it is generally easier too.
With the Ubuntu LTS (long term support) releases, you also get support for at least 5 years, so you don't have the hassle and potential breakage of major system internal updates for quite a long time.
Valve's own stats show Ubuntu as one of the most popular too and it has been the same since Steam came to Linux.
As a user of Fedora myself, take it from me if you're in any way new to Linux: just go with Ubuntu. If you ever decide you "really know Linux now", then you can think about using something else. Don't make it difficult for yourself.
How might this change in future?
Well, Valve are here with the Steam Deck and SteamOS. Eventually, Valve will release SteamOS 3 so anyone can download it and install it. That might end up being a good pick, but right now it's not on the table as it's not released and anyone making their own version of it (like HoloISO and others) are too small to recommend serious use of them.