How to start a small business selling things?

Hey ladies, I’m trying to make some money on the side. I’m currently unemployed because I’m taking classes this summer and obviously, employers are looking for people with a more flexible schedule. Not only that, I will be having surgery on the 26 & won’t be able to do much lifting/pushing etc. So I want to know what crafty things I could do and sell? I have no skills or talents lol. I do draw but I want to do more than just that. I’ve recently been getting inspired by 2 girls who are teen moms and sell custom clothes. I’m wondering if they make the clothes themselves or how does that work?? Do they pair up with custom shirts businesses or what? I’d like to sell custom shirts/sandals but not sure where to begin. Any tips? Ideas? Insight? ANYTHING? Lol Help please