This is free advice from an expensive psychologist. If you’re an anxious person, do everything for fun. Go to a job interview for fun. Submit documents for fun. Start a blog for fun. Anxiety feeds on importance. Don’t make everything a matter of life and death.
A little bit out of topic; a small word of advice
please find your happiness from various source of things, don't be dependent on a single thing alone
Life is too short; make it worthwhile and discover plenty of new stuffs.
You just learn better when its your favorite character. Fun is such an important part in learning to draw and it's not often talked about. The facts are rooted in learning science.
So don't talk yourself out of drawing the fun stuff. You don't have to suffer to learn to draw.