When we work with people on self custody for the first time we often recommend these wallets (in no particular order, just tradeoffs)
Blue Wallet as nostr:npub1zf9j8uhkw42q92nczjcctnx3qehm7ru79dl9vd5rc7pakqj9t9rsszq56h said for ease of use and nice UX. Able to go more technical with it, if you want. iOS & Android
Samurai Wallet for mobile coin join capability + many other privacy features, android only.
Muun- for ability to interact with lightning. iOS & Android