I think the most important thing you can do is to keep drawing no matter what. And to not be afraid of drawing whatever interests you. If there is something that you want to draw, to make, then I think you should pursue it and not let anybody tell you that you can't do it.
A lot of me is very up, and you have to have light and shade. They are both important and you have to be able to balance them. You have to admit that sadness is part of you and that it enriches you. I use it in my work.