Does anyone here NOT use AI to make their poster designs?

But I just made my first sale and went to process it on printshrimp and I didn't expect to pay upfront to printshrimp. I thought I had watched the videos in the classroom thoroughly but maybe I missed that bit. Unless I've done something wrong? So am I right in thinking that when an order comes through, you pay printshrimp and then Etsy take a cut and then you should be left with the amount that print shrimp so in the orders guide? But initially you will be at a loss until the money from Etsy is released?

How do I find the section for filling out FAQs for my Etsy shop as advised in the creating your etsy shop video?

Where can I find the image of the frames for my Etsy listing?

The classroom video says to make mock-ups by making them. Can I not just use AI to make the mock ups? Any issue with this?