Lila. Good morning. I have some bad news for you. You entered your private key, which is like your password, into your Nostr address field on your profile. You are giving the world your password to use. You can't change your password. Therefore, since the world has access to this password, the world now has access to your account and can post as you and do everything as you. Your account is burned.

I would create a new Nostr account. Sign out of the app you're using and create a new account or profile. Save your private key. It starts with nsecXXXXXXXX. Keep that safe and secure.

Your Nostr address, which to tried to enter, is something completely different. It looks like an email address. Don't worry about that for now.

Good luck. And if you need help, you can DM me.