Training or something is of little use. Mainly depends on your personal ability. Ability = perseverance.

The secret of Churchill's speech at Oxford. He said. Insist. Insist. Work hard. You can succeed.

I made it very clear.

If you have the conditions at home, you can learn the basics of vegetarian noodles first, and then temper yourself. A good illustrator is a versatile person. They are not muscular men who can only draw. Know some history. Reading is a good way to enhance the connotation.