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Look up Daijisho on the play store. It's a front end that will organize all your roms and emulators. You probably don't want to rely on touch controls, so depending on your preferences you could get something like a gamesir controller which your phone will fit into, or use an external controller.
This video is a good guide for setting up Android, and this one for setting up Daijisho. They're both very exhaustive guides, his videos and website are excellent resources for anything emulation.
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Razer Kishi or Backbone to get a handlheld console like experience. I haven't used it personally but seems to have gotten a lot of good reviews and both are compatible with S22.
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All you really need is a controller for it (backbone, kishi, gamesir x2) and the retroarch app. Dump your Roms to it and done. Maybe some tweaking in retroarch
