Fantastic! How long have you been drawing? (Hint: if you say "a year" I am chucking all of my art supplies and taking up fishing!)
I am almost 60 now. When I was very young, my grandmother gave me an Etch a Sketch. I learned to draw with that toy. I still own several and draw when I have time. In 7th grade, I took a mechanical drafting class in school. This was before computers and CAD. Using pencils, triangles, a T-square and sawdust on the paper. Pretty sure the drafting was the biggest influence.
Interesting how you started into drawing. Yay for grandmothers! When my grand kids come over I let them paint and play with play-doh and color and draw and do other crafts. Their parents don't like to have the mess but at my house I don't worry about that too much. It's more important that they be exposed to things to find their talents.