Only thing I really have is that virtual marketplace idea
Since you are unable to do basic math and code, let alone afford coders, inventory, and advertizing, what you should focus on is something completely different.
You kidding me? lol, I hate the public.
One more reason this type of work isn't for you.
What should I focus on then?
Perhaps you could focus on your education as well as doing everything you can to keep the part time job you were lucky enough to get.