I recently started selling nature stock images on the top 4 (SS, iS, DT and FT) and my income from all together is maybe around 100-130€ a month.
I do not wish to have ärger with the Finanzamt but do not want to unecessarily declare earnings or register as a business, I work full time in Munich and the stock photos are really from my hobby. German beaurocracy scares me somewhat. If I have to register is it Gewerbeschein, is it as a freelancer? If a freelancer what to be, Fotograf, Grafiker... etc?

I would really like to save the trip to Starnberg Finanzamt but would reallylike some information to be able to go forward.
Sorry for the English, but I want to understand the best i can

Many thanks, looks like a cool forum!