Trying to find an exercise for me.

So I'm 22, 5 feet and 1 inch, and around 205 pounds. I have a pervious high ankle sprain, I'm looking for an exercise that doesn't cost much. Does anyone know anything about Zumba for the Wii? I am starting to walk for an hour a day at least, and started yesterday. I am a poor college student so I don't have money for gym memberships or workout DVDs. The wii Zumba I can get used, and I wanted to try that because I love dancing.

Does anyone have any other recommendations?