How does that look like?
Always wanted to implement parkour training but I cant find a proper location with plenty of doable obstacles without too much citylife around. Be it in a facility or outdoors.
It looks like this
It´s partly inside a sports hall and partly outside at a parking ramp here (at the beginning more lessons inside so you get hurt less, lateron more outside so you get a feeling for different surfaces). You mostly practice how to move safely over obstacles, fall correctly, jump efficiently (and precisely, precision jumps are hard!) while using as little energy as possible. It´s a lot about momentum and technique.
Basically you can measure how good your jumps etc are depending on the noise you make: the less noise you make, the better the movement is.
Check if there are some similar sport programs around your place. If you want to try to learn it yourself, 2 things: Don´t practice on wet or slippery surfaces and always safety first when you think the next move could be risky. Better a pussy with a slow training than a hero and 4 weeks of no training because of some stupid injuries. Oh yes, and always look for the right technique, it´s all about technique in parcour