When you create your own content, that material has intellectual property (IP) rights attached to it. You, as the creator and owner of these rights, can exploit them or license them as you see fit and earn income from that.
Therefore, if you’re an indie author or indie creator of any sort, you should become familiar with your IP rights and explore the various ways to generate income streams from them.
In the case of books, this can include creating various formats, such as print (hardcover, paperback, large print, etc.), digital (i.e., Kindle .mobi, everyone else .epub, PDF), audiobook, and different adaptations (film, podcast, radio, graphic novel, etc.).
Of course, you may not have all the skills necessary to create and/or adapt your work in every single format. That’s where outsourcing and collaboration with the right people can serve you well.
This doesn’t need to be terribly expensive. There are various tasks that can be outsourced through inexpensive providers on sites like Fiverr.com and Upwork.com.
Needless to say, it’s always a good idea to make personal connections and vet someone’s background to make sure you’re dealing with a professional.
It may also help to check out some of these productivity and automation hacks from a 6-figure freelancer.
What you lack in dough right now can be made through carefully chosen side gigs.
In fact, I’m engaged in a couple. And here’s a video review of the book that helped me choose them.