Glad to see an actual freestyler giving it a go in this department and not just some guys who just want to make a quick buck off of freestylers.
It would be amazing if you could make shoes and balls designed especially for freestyle football. Those are the most important part of everyone's equipment. Apparel is OK, but it's less relevant and to be honest, almost anyone can make a cool looking T-shirt these days.
My suggestion would be: get a bunch of freestylers on board, which will help you create these products, test them out and give you constructive feedback.