There is an app called 'Jump Off Pro' and it does cost money but I've seen videos on it and you take a photo of your course and it takes you through the ride. It's hard to explain but if you were to watch a video on it then you could see if it will help yo
When walking the course. Walk the first 3 close your eyes. Ride in your head, walm next 3 ride all 6 in your head, walk next 3 ect. Then walk out of course look at each jump and ride in your head. Close eyes and ride the course.
I'm just going to show this morning haha
I personaly walk the course with my teacher and at every jump I look back and point the previous jumps. In the end I walk it once or twice alone, and the best for me is to close my eyes standing still and pretend to do it, I imagine how I must ride my horse for this obstacle and if it turns left, I turn left etc
I may look like a fool but it really helps :)