Self study Spanish learning course?

I learned English as a second language and got pretty good at it when I was a teenager. Now I want to learn Spanish as my third language but I’m too busy to be able to attend classes and frankly I haven’t been able to find a good teacher or class so I decided to try it and learn it on my own. I’m wondering if there is a course that I can work with that focuses on listening and speaking maybe a series of audio books that I can listen to on my way to work?