Try to look for theses ones 
- Wallet Of Satoshi (open source but custodial, the simplest for zaps and Lightning)
- Zeus (open source, self custodial, a little bit more for advanced users but not too hard to use, you need to "buy" your Lightning address to receive and send zaps)
- Mutiny (open source, self custodial, you need to pay a subscription to have a Lightning address but they say if you pay only one month and then stop you keep the address and they don’t care)