I was lucky, and got an Alby wallet before they started requiring invite codes. If you can get one, that would be an easy way to go since it has NWC (Nostr Wallet Conmect).
A lot of people like Wallet of Satoshi, which I believe requires installing their app. When you first zap, Android will ask you which app to open, then it will automatically open when zapping after that.
After you get a wallet, if you can't figure out what to do next, reply here, and I'll see what I can do.