Try learning to Ollie into a manual if you cannot already, I learned that and how to 50-50 and the 5-0 came naturally after that.

Thanks

Learn to jump into a manual

Learn ho to do a 5-0 stall at the begging

It's just manual

Try to ollie as high as you can for landing on back truck (while standing)

Ollie and then once your high enough to get on the ledge put all your wait on the tail