I tell all my customers they should be focusing on building a list in their niche.
The list is about collecting a list of subscribers, emailing them an email series (10-15), some content, some promotions (to an affiliate product if you don't have your own), some articles, to get interactive.
I think you would be able to write your own content (as you are a writer),
-a squeeze page is easy to make (check mine in the WSOs)
-It can be in any niche you are interested,...