Can you write your own name? Are you sure?
You'd better start practicing, endlessly, on random walls, and cars, and trash cans, and street signs with a big marker pen, until you're really really sure you can spell it right. Otherwise how will you be able to sign your work when you eventually get round to drawing a picture, perhaps of a dog, or a cat on a mat.
But don't, under any circumstances, draw any pictures or anything fun like that YET, not if you want to be taken seriously as an artist.