I need to know, that thing is beautiful.
Lot of great suggestions already. I would say whatever you pick, try to stick with it for a little. Emulation can be a rabbit hole of just trying games out to see how they run only to never make any meaningful progress in it.
Be better than us.
Midnight Suns wrung a lot of hours out of me when I first got a Deck.
I’ve done an RMA with Valve before and other than the length of time (somewhere between 2-3 weeks for me in the US) the whole process was super simple and streamlined. Get label, drop it off, wait.
But odds are you will be fine. Definitely take a close look when you first unbox/setup but I’m hopeful you won’t have any issues.