Hey there, I am in Orange county, and I had a friend that went to UCI. She dormed off campus which was in reality an apt complex where people other than students lived. She still called this place her "dorm" even though it was off campus. So perhaps this place is not a dorm on campus?
To the OP:
You seem like an intelligent young person. The fact that you keep salt water fish and that they haven't died is impressive. My dad kept those for years and we always had some dying. He was obsessive about them as well. Who wouldn't be with a fish going for $40 or $50!
I think at your stage in life it would be ok to get a yorkie. I think they are easier to train when you don't have a 9-5 job where you have to leave them alone all day. Esp if you plan on getting one in Aug you have a few months of summer break with nothing to do
but train it! I am fortunate enough to be able to be with my Uni all day, and we were able to get her potty trained and a couple of tricks under her belt by the time she was 4 months. We got her at 12 weeks which is about when you should get one, no younger than that.
Yorkies can be barky, but again, if properly trained, they will stop when you tell them too. They have a bad rep of being hard to train, but actually yorkies are very intelligent and get bored easily. You must always let them know you are the boss, not them.
I would also research a good breeder before you commit to buy one. There are lots of threads on here to help you find a good one. Also, make sure to go to their home, see the pup's parents or at least the mother, do not buy from a pet store, or off craiglist, online, etc. Be prepared to pay around $1000, but just b/c it's expensive doesn't mean it's better/healthier. Beware of breeders who use "teacup" "teddybear" etc to advertise their pups. There are lots of BYB here in OC that will try to rip you off, esp since most the residents around here are fairly well off.
There really is a wealth of info here on YT. You have some time, so read all you can on this wonderful breed before you get one. i am in OC like I mentioned, if you need help i would be happy to help you out, just PM me! good luck!