Game update

Hoping to hear back from "the specialist" today which is cool. Thinking of talking to a graphic designer to do the card design for me since I'm really not great at that kind of thing.
My main worry now is about the business end of it all. Technically I'll be making a product that I then sell. Even though we're talking minor profits, it still sounds worryingly like a business to me and I'm wondering if I need to register or report financial stuff for tax or stuff...