20F looking to get started

Pretty much the title. My rent is due in a few days and I'm in a really bad spot financially and need some extra money fast so at this point I'm willing to do literally anything. Im a server so my pay is really inconsistent but I heard passive income is a good way to get good foundation but I have no clue as to where to even start. I know it's not an overnight fix but I'm tired of being paycheck to paycheck and need to come up with something fast