Hey, cool post :) . I tried recently to make my own and well, lets say it is not my strong suit.
I tried a banner with coins with Crypto logo's, my Steemit name and a steem logo. I didn't do well at all but i will post a link. I chose that crop because of those coins, as said pretty rough :).
It's not bad at all! Give yourself some credit. What software did you use?