parkour isn't a thing people teach you, it's a thing you get progress fully Better at.
I was never good at parkour myself but then i kept trying i'm still not quite there but i got better and better.
so just keep trying and you'll eventually get there, it's just like making your own run, it might take a while but it will happen, I've made quite a few runs but i just can't remember them.
So remember just keep trying and then you'll be able to Parkour Properly.