Silly as it sounds its actually what you need to do, don't wait till you get to where you normally turn around to try and jibe. Try it every 100m or as soon as you have good speed.
You need to tune your brain to do stuff without you thinking about it, just like breathing and your heart pumping blood, you don't think about it just happens.
But first you need to follow some steps, I found watching just one good instuctional vid the night before helped my body to start the process without to much thought.
The only thought I do now is " unhook, back foot out of strap and to centre of board" and I can't tell you what I do next, it just happens, until I get tired that is and the legs forget to move.
Another tip, have really good speed, don't slow down before the jibe.
One day you pull one off, then another and another, the first is the hardest.
You must persist,
Video, Try, fall off, you know the drill.
Weve all been there