Living in a university town with a much older, tech-savvy brother meant I first used the internet in 1990 at the age of 13. I used the internet before pretty much anyone I know other than my brother, but I was on MU*s and Usenet like it was home and then I discovered IRC...
I'm not saying I was smart, just lucky. In fact, I was pretty stupid about the internet. I remember seeing an early website in 1993 maybe and saying something like, "it's cool, but it will never replace Gopher."