Just try and do a fs Ollie where you turn at the same angle as your board to the ledge keep skating 🛹

If you are popping into a boardslide, you might be opening up / turning your shoulders towards the obstacle when you ollie. Try approaching the obstacle a bit more parallel so you don't do an accidental 90 degree ollie into it and instead just pop more or less straight onto it.

Ok what you need to do is you need to practice getting your Ollie that high then you need to learn to learn to line your back with your front.

Try to focus on getting your front truck on and then it will be easier to lock on properly