Not the most scalable and requires the person to trust you (Uncle Jim), but if you have your own LNbits instance, you can easily create new accounts there for them and set them up with a Lightning wal...
In my opinion, this is good enough for starting. If they ever accumulate a significant amount of money there and it's time to move to a cold wallet, you are in a much better position to have their attention and interest. Since they already have money at stake, they won't be rolling their eyes the way they would if you started ranting about complicated key thingies when they hold 0 sats.