One of the most important things you learn in art class is using reference. To put it simply, copy stuff. In doing so, you learn how things connect and when your oranges come out as squares, maybe you need to look into that.
Here’s an example of copying from source material I did when I was probably about 10 or 11–the drawing is untitled, so I can’t say for sure, but I’m reasonably confident I was around that age, as it jibes with when I was reading Disney comics.
It’s actually a pretty good representation of Pluto, the odd dog pet of Goofy–odd, because Goofy was also a dog, of course. I’m intrigued by the fact that I did this using felt pens, as I have very few examples of felt pen art and the majority of my stuff was done in pencil or, to a lesser degree, pencil crayon.
PLUTO:
And for the sake of comparison, here’s the same with the wrinkly, yellowed sketchpad background removed:
