What should I know about privacy laws for my start up?

In the show Silicon Valley their start up Piperchat got in trouble with the COPPA, which has to do with children under 13. Should I be worried about similar problems with my start up? I’m guessing there are a LOT of these types of acts that I am unaware of, and it might bite me in the ass in the future. Is there a list of basic laws that I should cover in my terms of services? Or some service that helps start up go through things like that? I’m making a note taking app to add more context. – by hq overview fibonacciseries – –