I think you might find that you will need an invite code now. This is a recent thing that nostr:npub1getal6ykt05fsz5nqu4uld09nfj3y3qxmv8crys4aeut53unfvlqr80nfm implemented. I can understand your frustration. The other custodial option is the Wallet of Satoshi app but they limited its use for those in the US recently (although many US based users seem to still use it). I’ve started using Primal mainly because they provide a LNURL (you can give them temp details etc).