Hello, just saw this post and wanted to try giving my advice being a solo ttrpg player for around 4 years, If you like the mechanic aspects of the ttrpg games I think you can try some games like "Four Against Darkness or 2D6 dungeon" There basically dungeon crawling games where you generate your dungeon on the go and fight monsters, they're really fun books and I play a lot when I don't want to roleplay that much. (I'm saying this because on a post above you said you don't like roleplay)
And about having a android, you can play a LOT of games on it, many arpgs are available to play on a phone, like icewind and neverwinter nights that is an amazing game based on D&D 3.5, you will have your character, ttrpg mechanics and roleplay on your phone!
And we also have emulation, you can even emulate a nintendo swich, ps2, gameboys, etc on our phone now days so you can play many rpgs. I can recommend you some if you want. :>
