If you have a good friend that has a bike and would even help you learn to ride it, I think that would be a darn good idea. It would give you a start on cycling.
I don't think the chances of damaging it are too great if you're just going to learn to ride it in a safe place, like a quiet street or parking lot, and if your friend is right there, no sweat!
The main thing is if the bike is a good fit for you, it will be a lot easier to learn on.
Good luck!
__________________
"...perhaps the world needs a little more Canada" - Jean Chretian, 2003.