I think this is good, and it's up you to put in the beginners, notice how it says experienced artist looking for critism, I think your experienced enough, it looks nice,
if you dont know where, just put it in beginners! notice how below where it says "Beginners Oekaki" it says "Artists of all skills levels welcome here"? doesnt mean its bad if its in beginner!
i used to have a neat signature just like i used to think i had my life put together lol