Go for it Bitsy!!! You have the talent and it never hurts to follow a dream.
I am sure you could find business books that explains taxes, write off's, etc to get you lined up for the IRS standing in line for their share. However I think anything under $600.00 made is not taxable ?? Your business is a "service" not "retail" so not sure of all the in's and out's of it to be honest with you.
How fun though and keep those pictures coming!!