It sounds like you are doing a great job! Dont be too hard on yourself OP. You sound like you overanalyze like I do
I am on the complete opposite spectrum. All I had access to when I was a kid were the new green ponies and horses in for training or schoolies needing a tune up. Which led to me buying unbroke horses and starting/training them until they are ready to start in the show ring and they always end up selling. Then I am back to square one.
Twenty some years later and I am still following the same pattern.
Admittedly, the best teacher I have had was a hot, sensitive and spooky Iberian filly which I just actually sold and she is moving onto a 1.20-1.30 career with a junior.
That filly tore me down as a rider. She was great to start, but boy was she ever hot! Smart as a whip but if you didn’t RIDE properly and effectively, get ready.
The best thing I ever did was take some lessons with a rider who knows the type of horse (actually the owner of the filly’s dam), grab a dressage saddle and some full seats.
To this day, I live by, ‘want to learn to actually ride? ride a hot horse for a few years’.
Best advice, ride the horse you have that day nice and forward, focus on your position, learn to ride more from your seat and thigh. Centered riding instructors will be your friend.
When you ride properly and effectively, you will get the best you can out of horses.
Good luck! Learning to ‘ride’ never ends!