Hi Sophia. You're doing pretty well so far by starting with learning Hangul first. I see a lot of recommendations where you should study the alphabet first so that you learn without having to romanize the Korean. That accelerates your language absorption.
For reading and studying, I would recommend the Living Language Korean series. The complete edition costs about $50, comes with 3 books - essential (beginner), intermediate, and advanced. There is also a booklet with 9 CDs, 3 for each book, for audio lessons. They also give you free quizzes and games to play on their site as well.
I would also recommend that you visit www.talktomeinkorean.com. It's another free resource that you can use to listen to native Korean speakers speak. It's a lot of fun.
All in all, I would recommend these two. If one or the other does not work, then you can seek other sources, but out of everything I've seen, I think you will like these two.