You need to set up wallet. I'm using wallet of satoshi and paste at the LN on your profile settings. Then you can zap or get zapped.

I'm using Get Alby extension on web browser. You can ask nostr:npub1zk6u7mxlflguqteghn8q7xtu47hyerruv6379c36l8lxzzr4x90q0gl6ef for more details.