There are quite a few computer based programs for Spanish that you can pick up at either Sam's Club or Costco. Also look into the Berlitz programs that you can purchase discs for. I learned more of my Spanish by watching movies in Spanish, first with subtitles in English, then without. If you ar learning Spanish for the medical field, it will be different than the Spanish that you will learn in class or on-line unless you can find one for Medical Spanish.....Have you tried a search for that?
Hope that this helps..................and yes, knowing Spanish is quite helpful and will make your life much easier.................