I dunno in how much detail you want this but I'm dropshipping using an on-demand printing and fulfillment service. I create my designs, I send it to them, when I get an order, they print, pack, brand and ship.
I marketed my site using fb and ig ads (fabulous conversion rates on fb retargeting) and automated my community building on ig using an instagram bot I found on github
I marketed my site using fb and ig ads (fabulous conversion rates on fb retargeting) and automated my community building on ig using an instagram bot I found on github