Bazzite 3.5 gets updated NVIDIA drivers, expanded handheld support (including Steam Deck OLED)

As far as I understand it you're more or less tied to flatpacks for any sort of software installation, unless you want to use a virtual machine for every other programm, which is extremely limiting. You can't modify the root system either, which might be negligible for most people but being so limited for software is too much of a limitation for me.

Especially as a new linux convert I would say wait a bit before switching to an immutable distro. They have their advantages but the concept probably feels pretty alien for most windows users, where you can install whatever and it just works. I've been a long time Nobara user and it's pretty good, especially considering it's basically just one guy maintaining it. But it does break on updates from time to time. My personal recommendation after getting used to linux would be opensuse tumbleweed. It's constantly updated but never breaks. You generally don't need a gaming centric distro, especially if you're rocking an AMD card.

I would say it feels closest to steam os. It’s immutable. So make sure you understand what that is. I do like the built in wallpaper engine support. Had a bit of trouble with multi disk support. But got there after a bit of fstab tweaking.