Aw! It's so cool that you're wanting to work for your aquarium. The only reason I have a job is so that I can support mine... Victoria's Secret doesn't pay enough for my obsession, haha.
What you need to do, or at least what I think, is get in good with a SW guru. You said you've learned quite a bit already, which is fantastic! I have a friend who makes a LOT of money CLEANING people's SW tanks! She says that she gets paid more doing that than she does working at *****. People trust you if you want to work to support a good, healthy hobby! I would totally hire you, but I live in Alabama... Go to your local pet/fish store and check it out! Learn things from reputable SW hobbyists, I know you can do it.
Another way, I'm sure you've tried this already, but ask family members and friends of the family if they need a worker. I work around my auntie and uncle's house and usually get $40 - $50 a pop. It never hurts to ask! ^_^
Good, good luck with this!
(I've felt your pain, I'm about to turn 19 and it's hard to get a job even then!)