I took 3 weeks to get on my PSG schoolmaster (purchased five years ago, when I was riding at novice) - I lunged him until I felt he was settled in - whereas actually it was me being nervous! But once I got on, I knew the only way to get better was a commitment to years of steadily riding five days a week, weekly lessons, and competing, and all the while I could feel him adjusting to my experience, teaching me something new every ride. He’s got a million and one evasions, but if ridden correctly he will sigh (audibly) and do his job beautifully.
Some days I felt I wasn’t getting anywhere, and got very down in the dumps - but I was getting more balanced and secure in the saddle. The videos of us from early days tell a tale. Now we’re competing at Advanced (I’ve nearly caught up with him).
Schoolmasters educate you to get a feel for, and learn the correct light aids for the higher movements. They are treasures, privileges, and the most wonderful patient creatures, and yes, rare.
I am seeing a similar situation play out at my barn. Two ammie returner riders in their 50s - each recently bought fabulous 4 year old WBs with huge movement – the first one took years of lessons before buying her baby, and she’s there five or six days a week working with him and has a coach. He can be a peanut, but they are progressing. The second rider bought her big moving youngster after the death of her quiet Appy. She really over-horsed and has ridden her new horse maybe twice. No regular coach - and he’s become a paddock ornament. Its ironic as he is the quieter by far of the two four-year olds. She’s about to sell him, and you should see the queue of local dressage riders just waiting for the ad, because he’s divine, but for her, he’s too big moving, and too young.
The advice from the forum is spot on.