Yes watch Mocucha's video mentioned above it is a great way to start.
Now talking about what you proposed is all I can think of atm, no one can be tought how to parkour all the great parkourists : Swexx, Largekilla, Begotten, Flash, Chazer...
Have all been training themselves for about 1-4 years it all depends. parkouring and sparring is something you can learn by yourself watch mocucha's video and try to implement all the tips and strategies given into your own movements.
Joints : This is a really important point in sparring and parkouring. You cannot spar or parkour without knowing what each joint moves and does to your movements. Go into xspar.tbm from the mods and try each joint and space about 5 times notice how your tori moves how it changes. Wrists may not seem important but they are super super super important, [ESSPECIALLY] (emphasizing there) in parkouring wrists are one of the most important joints in the game and parkouring itself. So do that with every joint, now as you play more you get better don't and I repeat don't give up if you fail for the first few weeks or even months you will get better, you will learn from your mistakes. Try watching two really really really good sparrers play and ask them politely if they can enable real time ghost for spectators so you can see what joint they move at what position , for example they move their chest right to turn right while in mid air etc...
I hope the above helps you in anyway and keep practicing ;) Good luck!