Lol what happened at the STB show, it sounds interesting!!
I would also advise getting an instructor to work with you and the horse. I live in QLD so didn't see the STB show and can't comment on the horse or your riding skills but going off what you've said that's what I'd be doing. Or better yet - is there a more suitable horse that you could be using i.e. one that is a bit older and a bit more educated? I don't think you've allowed enough time to prepare yourself or the horse for this sort of comp, if the horse has no trust in you and you have had problems handling him in the past then you could have big problems trying to get him over jumps and around a course...
Even the most experienced of riders need guidance sometimes and there is no shame in gaining wisdom from someone more experienced than yourself
