Ok so nostr:npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm or nostr:npub1earna05hx6ax38r33h3atmecjzdu547m8suw87w70aw6mlyga4hsqcja5j is going to be your easiest option. They are custodial meaning if the company goes under you funds are gone. But it's a few bucks that I can loose, plan accordingly. You once set up an account your looking for a lnurl address: 