You should start drawing on plain paper. Your work is absolutely lovely- but it looks like a doodle because of what you drew it on. Also, eliminating words/text from your work will go a long way toward making it seem more finished and less like a doodle you did in math class.
Please understand- I think the drawing is really pretty. I wouldn't bother if it weren't. No paper can make a bad artist good. You're good. Show it.