I thought about this a little more and thought I'd add some thoughts. I saw in one of your posts you were still in school. When I was your age I had aquariums but very limited funds. Also, no internet and unless your pet was a dog, cat, cow or a horse forget it.. anyhow, I got aquariums used from people who were getting rid of them. Either because they were not into the hobby anymore, or had leaks. I also had almost no access to exotic fish. My first I think were guppies from science class at school when they gave them away to the students at end of year.
So I made natural set ups, where I would catch minnows or tadpoles, get local plants from ponds etc.. I learned a lot about fish keeping in general without spending hardly any money. So, I'd suggest lo-tech, less exotic species and set ups until your funds, time and space allow.
In conclusion, there's a lot you can learn, and gain experience from without spending a lot of money. Be patient and try not to get discouraged. You'll fail a few times, that's ok. Use the advice given in here by all the people who have gone through this. Take everything you read on the internet with a grain of salt (My advice included). Try not to get overwhelmed by trying too many things at once. ...and most of all enjoy it. You'll look back at this experience late and be glad you had it.
p.s. there were times my mom was afraid to go into my room. She never knew what kind of critters she'd find in there...