I think one can very easily learn hangeul by himself. It is not that difficult,
You could use one of the following links to learn hangeul
http://www.busyatom.com/node/2911/korean-alphabet or http://www.youtube.com/watch?v=KN4mysljHYc
One can learn to decipher hangeul in a couple of hours but, to read it fluently it takes a lot of practice.
In my experience most Koreans will speak you in English, unless your Korean is fluent,
I study Korean every day by myself, but I am by no means fluent.. My dream is that one day my Korean will be so fluent that no Korean person will answer me back in English when I speak to them in Korean.
I love Korean culture and language. Although Korean is one of the hardest languages for western people, it is really a fascinating and marvelous language, As far as I am concerned, learning Korean is one of the best thing I have ever done,
I wish you good luck with your Korean language learning experience. 화이팅!