Some time ago, Roger Ebert developed a product for teaching editing technique in colleges. I believe it was called “The Heist”, or something like that. It consistes of multicamera, time code windowed footage of a staged bank robbery. You used to be able to get it in almost any video format. The idea was a professional director and camera crew shot all the coverage and closeups for you, you had to put the sequences together, and there were many, many ways to do that.
I don’t know if that product is still out there, but it might be worth looking into.
Failing that, if it’s practice you want, contact a local drama group and see what they could perform for you that you could shoot in a similar way.