Get a Miyoo Mini Plus.

Swear to god, this thing is amazing. You just put OnionOS on it, which is super simple. You then put your roms on, which is ALSO super simple. And then you play your games.....which, running them is super simple, but it doesn't make me suck any less at Pacman! JUST EAT THE DOTS!!! NO DON'T RUN INTO THE GHOST!!! Great.....now the ghost ate you. Are you happy, you rotund yellow puck??? What? No don't censor me! I said puck!!!! PUCK!!! NO NOT FU.....nevermind.

Still though. Get a Miyoo Mini Plus.