I wanted to go into astronomy and quantum physics, but when I found out how hard it was to get a job for that subject, how little jobs are generally available, how much education is needed, and how little a lot of those people are paid for how much they had to learn it pretty much killed that idea. (Although I might as well because I ran out of money and it didn't matter anyhow.)
Before some crap happened and I wasn't able to continue going I was learning chemistry and after that biochemistry and genetic engineering. All those dreams of doing any of the things I have listed have long passed me by. Now I get passed over near minimum wage jobs from people that are dumber and lazier than me while I struggle to get by.