Rio Grande, the Flow and the Flub-ups

Saturday, for the first time, I rode a gaited horse. Rio is, as we say in the South, a Big Ol' Boy. He's over 17 hands, but very gentle with a sweet disposition. Technically, he's a Spotted Saddle Horse out of a Tennessee Walker mare. Rio was very patient with me and overlooked my reining and balance errors. My friend's sister took this picture of us, I've just never very photogenic, sorry, but at least you can see how honkin' huge Rio is compared to his sister Cheyenne that Ava is riding. We rode around her property for only about 30-45 minutes, but it was still fun to learn about his gate and feel the difference between a pace, a trot and a smooth racking gait. I can't say that I did well at getting the horse to stay in the rack. My balance was off and riding with split reins was new as well since I usually hold the reins together. I hope I get another chance one day as that feeling of floating on a horse could be addictive. He was just so smooth. I know a lot of folks take issue with gaited horses, but for me, with my arthritis, I think it would be the perfect solution-not that I've been jarred much on other horses, but if I had my own horse and rode all the time, a gaited horse would definitely be easier on the old bones.
I was thinking on the way home that I have, in my entire life, been on a horse probably less than 50 times. It may have only been 35 times; I dunno. I feel comfortable on horses-I'm not scared at all, but until I met Ava, I'd never had any real instruction about exactly how to ride. Well, that's not exactly true. I used to have a friend who rode English and I did ride with her a few times-under her guidance, but that was 30 years ago now, and English is so different than Western riding. Now, I'm learning about different horses and such, and I just wish I had more time and opportunities to ride. I'm telling you though, I was more sore on Sunday and even a bit sore on Monday, than I was the last time we rode, and last time we were gone for hours! I wasn't that saddle sore, but Rio's width really gave my groin muscles (adductora) a workout. Just sitting up there is a good stretching exercise! ;) Again, my stirrups were not the right length. Look at the posture of Ava's foot compared with mine. Her heels are down, my toes are down. Bad bad bad. Once we lowered the stirrups, things were better, but still it was difficult for me to get in the correct posture while riding. This is just challenging and frustrating at the same time. I want to ride correctly. I want to do what the horse is used to doing. I wish I was 12 again, so I could spend my whole day with horses. There have been so many missed opportunities.

For those of you who are horse people, I'd appreciate some pointers and especially tips about my feet. I'm off balance because my feet are all wrong and this confuses the horse. (I think!) I used the arm-length guide to adjust the stirrup length, but I still have to let it out more. Perhaps riding with no stirrups will help me overcome the problem?