Kotobuki Shiro is a Japanese artist who draws cute anime/manga girls. While largely unknown, he actually is a stunning artist when you realize that he draws everything with only his mouth. After a car accident, Kotobuki was paralyzed and couldn't use any of his limbs, but he still learned to draw.
Consistency is key to improvement. If you practice a lot and then quit for a month, you'll have a setback in skill. Crash & Burn. Drawing every day will help you become a great artist.
How do I learn to draw? What is symbol drawing? Where can I get commissions? If you are new to art, you can find answers to your questions here.
What you can read and do to teach yourself how to draw and paint.