A2200 remote mic

I would like to try making some You-Tube instructional videos. The biggest problem I see in others efforts is sound. Too often the instruction voice is difficult to hear. I was thinking if I could have a mike (wired or wireless) mounted on my collar it would probably solve this problem.

Can someone give my some suggestions?
Perhaps I am on the wrong track even considering the A2200, should I be using a different camera?

Thanks