If you are interested in public speaking, but don't have too much practice in speaking, I highly recommend checking out a local open mic and trying out some stand up.
Easier to look a fool telling jokes than look a fool making a valid point.
Among other things, Toastmasters will cure you of what ails many accomplished speakers. That is, the verbal or non-verbal tic (umm, ahh, so, like, wild gestures, hands in pocket).
Easier to look a fool telling jokes than look a fool making a valid point.
edit: or Toastmasters