The title pretty much says it all. I was 4 years old when I first snowboarded. Of course, I was held tightly by my mom and only snowboarded a few inches at a time. I didn't get my first air until I was 8 :D

I started learning skiing at 12 years old. My dad held onto me aswell..I was too afraid to ski independently at that age. Pretty much the same as you, heh.

Start young, get a good start.