Next you need a nip05 verified name .

I can give you a @ poster.place name or you can choose another one. Have to add it to your profile under verfified address  

 What does that mean?
 

 I used a free one, I think it's working.
 

 ok I see it now. You should be able to post normally now

What client are you using? nostrudel.ninja is the only really functional desktop client now