I think many of us amateurs start out the same way you are. I know I did. But at some point there comes the need/opportunity to purchase the “next horse.”
Thats when some of us buy our precious dressage schoolmaster. Then we spend the next number of years gratefully babying them and holding them together with chewing gum and string, while we learn so much from them. And then, maybe we are ready to move on to training one up ourselves, if we haven’t at that point aged out of the concept of throwing a leg over a youngster!
I’ve shared my quirky but highly educated guy with our brilliant working student, heavily supervised by our trainer. I let him show him a couple of times last year to get medal scores. But I’m entirely selfish about not letting anyone else on him. Those educated legs have only got so many miles left in them.