I have a clic black and white Racking good big horse but we need help?

I have a great horse, Anticipation, I want enter him in a show or two but we have training issues. He just moved with me from Puerto Rico to the U.S. He isn't adjusted yet. His canter is pretty fast and he's pretty bouncy in a trot of any sort. I've never used a neck rein because it's not his thing. He's only a year old and I was wondering could he be entered in shows ever? How would I train him? I've got Arabians I've trained but never a Racking any tips?