I took two semesters of Arabic in college and I found I didn't actually get much out of the class itself. I learned the most when I sat down with my friend and just tried to have a conversation with her in Arabic. By practicing how to speak and listen to it the writing and reading bit came much more easily (since, after all, writing is supposed to be a graphical representation of a spoken language).
If you don't know anyone who speaks Arabic then I'm sure you could find a college student or something that needs a little money. Pay them to sit down with you for an hour each day and just speak with you. Don't use them as a tutor for the reading and writing except for the odd question or two! You should be able to figure most of it yourself from a textbook or something if you take it seriously.
