Anons will try to scare you but for the most part as long as you aren't rich you'll probably be fine, just make sure if you ever cash out a large amount to consult a CPA to cover your bases. Audits are random unless politically motivated, and not very common.
That said if they ever do audit you, you can get fucked in the ass hard. So you should probably do the CPA thing within a decade just in case.