That's not that slow. Everyone progresses at their own pace. I'm sure if you had a horse that you rode every lesson more than once a week you would be farther along. Don't worry about it. Keep working on the fundamentals because when you get to the bigger things and shows it all comes down to...
I read War Horse about a year ago and I remember most of the plot and everything, I just forgot what Topthorn's rider's name was and Albert's dad's name. If you know please help!