I'm wanting to use my Christmas money on a GoPro or similar camera that I can wear on my helmet. I would appreciate suggestions from anyone who has one. TIA!

Try and get hold of Fallon Taylor. That's all she does. 

Ditto.

Also, I've heard that they are very hard to balance at first during runs, so It's recommended that you do a practice run with it. 

For those that just want to try one, check your local library.  Our library has GoPros that you can check out.  I think there is a $5 charge for it.

We have a go pro hero 5 - had to buy an accessory to wear it on our heads. It's pretty cool.