Is Bazzite a good first Linux distro for a gaming PC?

Bazzite is a reasonable first choice if gaming and everyday desktop use are your main goals. It's based on Fedora and comes with a gaming-oriented setup, so there's less initial configuring to do.

You can still learn Linux basics on it. The main thing to know is that its immutable design manages the base system differently from a traditional distro, which may feel restrictive if you want to change lots of system-level stuff.

I'd look at Linux Mint with Cinnamon too. It's a familiar-feeling desktop for someone coming from Windows, and you don't need a gaming-focused distro to play games on Linux. You may have a little more setup to do, but its software manager gives you a straightforward way to find apps.

If tinkering is part of the appeal, regular Fedora is worth considering. Bazzite is built on Fedora, but regular Fedora gives you a more traditional system to configure. You'll need to set up more of the gaming side yourself, though, so it depends whether learning that is fun or just an obstacle.

Check the specific games and software you care about before picking a distro. Bazzite's gaming setup isn't a guarantee that every game or accessory will work, and a game update can cause problems regardless of how well the system was working before.

Also consider any extras you want, such as streaming games to another device. Hardware support and the available packages for those tools can matter as much as the desktop itself.