You are doing it right...starting around your passion. Most of us end up with somewhat of an "arranged marriage"
when it comes to our businesses. We get thrown together but fall in love over time.
Don't wait to get started my friend. You can throw up a free wordpress or blogspot blog in a few minutes and be on your way. You'll learn how to monetize it as you go, but you'll be building a following as you get on the job training.
P.S. Ad a photo to your profile!