I would just point them to nostr:npub1tg779rlap8t4qm8lpgn89k7mr7pkxpaulupp0nq5faywr8h28llsj3cxmt
They got it all!
The best HW wallet, guides. The simplest HW wallet I ever used. 
They also gonna add non-custodial Lightning support.
You can buy BTC directly in their BitBox App.

No brainer.