It sounds like you really could use a lot of guidance. Coming here is a good idea and hopefully we can all help in directing you to the right sources of info on English and grad school.
There were a number of things that confused me in your query. You mention wanting to teach English at the college level then talk about doing an MFA or a degree in Asian Studies or Comparative Literature or working with EFL. All of these are very different things.
As ppl have said, figure out what you want to do.
If you want to teach English to non-native speakers that is a completely different track than what one does in an English Dept. In my experience most places have a dept. for English and another completely unrelated dept. for those interested in Eng. as International/foreign Lang. The requirements for doing this type of English teaching are completely different. Look at TESOL for help with this option.
http://www.tesol.org/s_tesol/index.aspIf, however, you want to teach literature that has been written in English then you would choose your main area of interest: say, mechanics and machinery in 19th-c. Brit lit. You then figure out which programs in the world have great 19th c. Eng. Lit depts and look into what they are like. You might like the work a few authors writing on industrialism and you could see where they teach. Now, you mentioned graduating by 30. So you would get your BA at age 30 and start your Ph.D. then? It does take quite a bit of time so you should consider the Grad School life a good life rather than a hoop to go through. Grad school takes forever and is a whole life--hence this forum.
I don't know anything about teaching creative writing so I'll just say that I don't believe an MFA really puts you in the running for the type of positions discussed above. A degree in East Asian studies might be v. interesting and might make you a wee bit more marketable if you want to work in TESOL for Asian students, but it might be overkill. A degree in East Asian Studies would mean knowing a language/culture and studying that for itself.
You will have to choose what to do first, then follow the right path. If you won't be starting grad school for another couple of years you have some time to research all of these things.
I'd suggest looking at websites of English depts at various Universities, look for people you would like to be: a Prof. of Victorian Literature at a small school on the coast in New England who has written a couple novels as well. If that is who you want to be look at her CV (usually available online) or at least where she did her MFA OR PhD.
Good luck!