I am in much of the same place, I have no dressage trainer to actively turn to for advice, but continue to work forward any means possible.
I totally echo anebel! My goal is to achieve 70s (or 20s is eventing) before moving up to the next level.
You mentioned that you are clinicing a lot. Have you approached any of the dressage clinicians about their opinion? They've just seen your horse go and may be able to point you in the right direction. If you have any shows/farms that offer fix a tests, these are great opportunities to get feed back as well and go through the motions of the test.
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