There is a great demand for workbooks, which you can find for yourself on Amazon and etsy. You can either create printable workbooks or digital workbooks and sell them through various marketplaces. You do n ot need eleborate skills to create ebooks. You can create these workbooks on Canva easily. There is no need to write a lot of text and spend hours deisgning as these are about specific topics such as yoga routine, weightloss checklist, etc.