I am 17 years old. I would like to edit videos and sell my work to people online, but I have one issue that has been bugging me. As a minor, what are the steps that I legally have to take in order to start selling? I've gotten to the "publish" section on Fiverr and it requires me to sign a W9 form. Must I notify my legal guardians about this form and have them fill it out for me? Can I do it myself or is that a bad idea? I am afraid of the possible consequences of me filling out a tax form if there are any.
I'd appreciate the help as a young man with no experience in such things.