I think my digital footprint is positive because if you would enter my name in at Google, you would find websites for my school, the city hall, or in an obituary from a relative.
When I register for a website I include the bare minimum of what I need.
I think many people need to be internet savvy. Your parents, teachers, and peers should be responsible for teaching interent safety.
Instead of using an advatar many people just use their own picture. I dont think it is really safe to use your own personal picture.