Congrats on your first show!
I wanted to comment on this:
"Rejection is something I find difficult to deal with. I need to work on growing a tougher skin." with a big YES. You'll probably be shocked at what you hear at live shows. Blow it off - don't carry it home with you.
From the customer who smells every soap on your table and engages you in conversation, then says "Oh, my daughter makes soap; I only use hers".. to the one that looks sideways at your display and goes "I could just make that at home". People are people and lots of them are rude, without even thinking that they are rude. Don't let them get to you.