I started a local brand in my community. Basically every licence is a build off of another one. To get a wholesale licence you need a sellers licence, which is an application to pay taxes. I assume you have a drivers licence so you can get one. Honestly, the best way to print is to screenprint them yourself.. Its cheap, for me the whole setup costs were around 300$ to print pretty much around 100+ shirts. Plus its easy and fast. Personally i shelled out the extra money for american apparel because their wholesale is super easy and the quality is incredible. Plus think about it. 5$ a shirt, if you exclude setup costs, with setup costs its 8$ a shirt, which if you sell for 20$ each, is still a 12$ profit.
If you didn't read that read this:
You gotta spend some money to make money, so don't be cheap when starting a brand
Hit me up if you know or have any ski jigs. Looking for some used for markers