You have a good idea of what you need to work on. And the rest Allison already brought up. That would be your major flaw. The thing to remember is jumping is 90% flat work... so between the fences remember your flat work. Chest/hands/Eyes up, legs anchoring down around the horse and keep a nice steady pace. This saint of a horse will show you the rest. Love the celebration at the end!
If your horse says no, you either asked the wrong question or asked the question wrong
And God took a handful of southerly wind, blew His breath over it and created the horse