Research hot topics on Udemy

Heya.

I hope you're all good during these days with COVID-bullock....fiction or economic and social disaster.

I needed to do some recording to introduce some technical topics like a proper video course for reaching recruiters and have a digital brochure rather than a paper presentation.

I also thought to look into Udemy and see what topics were saturated and which one could be still viable.

Do you know any tool that provides statistics in this regard? Anything that answers questions like:

Traits of a successful course: structure, duration, interaction with students, feedback, promotion.
Niche analysis: supply and demand, keywords and actual statistics.

Kind Regards.