Try to do your best on the sim as it wouldn´t hurt and also it may help, but keep in mind that no simulator, no matter how realistic is will make you react in the same way you would flying the real thing.

Read as much as you can about jet trainers, flying setups ,safety procedures about flying and operating model turbines, and at your maiden flight try to have a experienced jet pilot to be your caller. Your chances of having a successful flight will grow exponentially by doing this.

best regards and best of luck,

Enrique.