[Nullifidian]

Just start drawing. Draw what you see, draw from your imagination, whatever. Just start drawing. Draw everyday (something I should uphold better myself but it's true nonetheless)
If you're bad at faces, draw faces. If you're bad at hands, draw hands. If you're bad at anatomy, practice anatomy. If you're bad at materials such as metal or gold, draw them. Gotta draw 'em all!