I would get paypal and call it a day, or hook up with someone that already has established credit, and get a merchant account through them. Or ask an established e-commerce site to put your products on their site, or do a joint venture if credit is the problem. There are lots of ways to get the money in, just get it in.
But indeed, you are going to be denied, since one what your selling is very high risk, and your age, and you have no credit. All of those are individually are red flags, 3 put together, you're in some trouble. Most merchants, look at your last 3 months income, actually further back. So if you can get in good with top level, you might be able to get around some of their flags.