As good as are the references provided by Heliotrope and that whole thread Michael cites, I've found it very helpful to take those patterns and templates and see how they are employed in actual stories. All that advice about read, read, read is all very fine, but informed reading beats uninformed reading every time.
I second this. Please take that post I made and apply it to stories or films that already exist. Read them and see where they used the beats (if they did) and why. Seriously, this is a major investment in time, but illuminating when you come out of it.
I've read about it early on in my first attempts at writing but had completely forgotten about it when I picked it up again after a break of a year or so. Subconsciously it must have stayed with me, because I came up with a vague concept that I wanted to try out that consists of "exploring a somewhat curious thing" followed by "discovering something dramatically more weird". Basically "shou-ten", with the ki and ketsu being kind of implied. But what I find really compelling about kishoutenketsu is the idea that the new element in the third part actually becomes critical in resolving the situation from the second part.For reference, here's my article about kishotenketsu: Kishōtenketsu for Beginners – An Introduction to Four Act Story Structure
I reread it recently, and if you disregard the punctuation it's a pretty good article.