Another software customisation - If you’d like to play Minecraft I’d recommend Prism Launcher plus a mod called Controllable. Whilst you can use Steam Input to set the controls manually, Controllable adds native gamepad controls to the game which work better and include some QoL features. I’d also recommend following this guide, specifically the bit about setting an instance to launch automatically, which skips the launcher screen. Not only is that more convenient, it actually fixed an issue I was having where the mod saw two ‘steam inputs’ and you had to change it to the second one each time - It was getting confused by the two windows which steam had given their own gamepad layouts. With only one window popping up now, it works on launch each time.

I don’t have any extra hardware, but I’d like to recommend Emudeck. This tool helps to set up all the emulators

A usb c multiport, or usb c to usb adapter for external drives or keyboard/mouse, and a right angle usb c adapter. I’d also get a screen cover for it. Software wise, I’d recommend cryutilities, decky, protonup-qt, flatseal, Heroic Launcher, ProtonTricks, Lutris, Warpinator, Bottles, and Corekeyboard

I haven’t done it yet, but my understanding is the hall-effect joystick swap-out is one of the most game changing mods. The dead zone on the stock joysticks is very noticeable, although gyro aim fixes makes it pretty much a non-issue for me personally.