You can diversify your income as long as you can manage them. When you are new and want to do something, focus on one thing. If you are successful on that, then move to another.
As you said, you did a lot of things like starting a coloring book business, t-shirt business, e-commerce business, blog and job. That's a good thing. Sometimes you have to taste what you think you're good at to figure out what you really want to do for the rest of your life.