Good luck! I made the switch and have gamed exclusively on Linux for about a year now. It’s gotten leaps and bounds better than it used to be in a pretty short time. The same is true on the Deck: if something doesn’t launch the first time, change to Proton Experimental in game properties and likely you’re good.

Your experience may be different depending on your GPU, though. AMD drivers are baked into the Linux kernel now, so It Just Works™. But nvidia can be a pain, mostly because you’re still tied to their proprietary driver and they famously don’t pump a lot of resources into Linux support.