What client are you using? Damus? If you can receive sats you can spend it too. Damus was censored by apple and they have to take out the zap button, but there are some other ways to perform a zap, and there are loads of clients that you can use.

I recommend you to read a little more about nostr, i did a list with good resources to learn. Nostree.me/gzuuus@nostree.me/nostr