Affiliate Marketing Secrets

Hey! I have looked EVERYWHERE online trying to find how can I make money online for free. I have tried this after that after this after that, and I still have not made a single dollar. I have watched video after video that tells me all the money that I can make and then at the end of the video it says, “I am only charging $49 or $94” or something like that.
I just started college and I do not have ANY money at all. There are things that I would like and need for college like an iPad, new laptop, books, plus more, but as I already said I do not have ANY money. I have tried and looked into everything from selling, blogging, surveys, affiliates, etc.
So if you know of how to raise money on the Internet without taking all my time from my studies I would greatly appreciate it. Oh, and I realize that people are not going to give me money. Any help and knowledge would be greatly appreciated. Thanks ahead of time.