I'm new where should I start?

[Nindo]

Here is some of my practice. Bad as you might imagine.

I assume you did these before I suggested the whole spriting objects thing. Honestly objects are a great place to start, living creatures are much more difficult to do properly.

At any rate, I don't have any idea what that pink thing is. I assume the furthest right is just a normal person's face. The bottom one is Spiderman, I think.

Well, for starters, why is Spiderman checker-boarded? The marks on his mask are supposed to be a pattern of concentric circles that increase in size. What you did conveys no perspective to the roundness of his face, nor to the pattern that the mask is supposed to have.

The normal person's face is rather simplistic, but I guess it works to a degree.

Again, I don't know what that pink thing is so I can't suggest anything there.