There's other ways of making a living at this than just selling content too. You can sell the art you make with it if it's good enough. You can sell comics. You can create your own content and sell the art you make with that. You can do any combination of those things and turn it into a living. With the rise of sites like patreon and other art markets a lot of artists are making their living doing what they enjoy. All of it comes back around to learning how to promote yourself, no matter what it is you're doing. You just have to find an audience for it that's willing to pay you to make more of it.