Thank you Cindy for this address, i will put this in my PS list.
Even if Proshow is no longer supported or published, you can still enjoy what you find on the internet.
That's how I find the sitehttps://danhpham37.blogspot.com/search/label/Project%20Proshowhttps://www.youtube.com/c/CunCunChannel/videos
There are lots of nice presentations for free and by examining how these are built you will learn a
lot and get enough inspiration to get started.
Good luck !