How can I make money fast?

So I have school Monday and Wednesdays from 9 AM to 5:30 PM. Then on Tuesdays Thursdays and Fridays I only work at my serving job in the afternoons. But I m not making enough money. And on Tuesdays and Thursday nights I have my firefighting mentoring from 5 PM to 8 PM. The weekends are for studying because EMT and fire Academy is really time consuming. Is there anyway to make money online that it s fast or worth doing? I m up for anything.