How much money can i make trading? Realistically

Years ago i used to be obsessed about trading. I was underage so i couldnt actually apply any of the little knowledge i acquired back then. I wanted to make a living as an investor back then but im past that phase, now im just a poor college student. I have forgotten everything about trading. The point of this post is to ask the following question: How much money can i make trading? (not an exagerated amount, a hundred bucks per month would be very nice)

I am a university student and a little money would be nice. I know trading is not easy, its not a get rich quick scheme. Im also looking for guidance. Where do i start? Is making a hundred bucks a month realistic? How much would i have to invest initially? Im willing to put effort into this endeavor, i hope this post is read by experienced people.