Good for you for wanting to learn another language! It’s very important in a a global society. I haven’t tried very many different programs, but I have used Rosetta Stone, the cd roms that you use yourself on your computer, and they are increadible. They are a little expensive, but probably still less than you would spend if you actually took lessons. I thought they were very, very helpful. Granted the price might turn you off to them, but if you are really serious about learning a language that you plan on using than it is definitely worth it.
Italian is a fun language, good luck!