My niche is ministry to Christian women in three areas: personal faith, Marriage and Parenting. The keyword search returns are not encouraging except for resolving marital conflict. Very low traffic. When I search for courses on Prayer many of the Udemy results led to dead ends. I couldn't find the course or the instructor. So I don't know what to make of that. Other niches may return far more robust results. I still believe anything in Health, Wealth and Lifestyle (Minimalism, Digital Nomad, etc. . ) is an easy target for great keyword opportunities. Eurekaa might be super valuable in those areas.
I had to watch a Youtube video on using the app. I didn't find it self-explanatory or exceptionally user friendly, but I'm a newbie to SEO.