I didn’t really follow a program, but I think you’ve got the right idea with slow, short work, tack walking, etc. I didn’t lunge much at all, except to get her comfortable and relaxed working in my indoor before I sat on her for the first time. And if she’s been on full turnout in a large and hilly pasture, you’re already well ahead of the game! A lot depends on her body condition/composition too. Does she have a typical broodmare bod, or has she retained some core and back strength? The equiband is a great tool, used carefully. My mare is very long backed with kind of a scrawny hind end, so I was constantly mindful of core/back/hip strength. Her body seemed to truly transform before my eyes in what was really only light/moderate work. My husband was jealous of Maya’s gains while he sweated his arse off lifting. lol
This was my rough timeline: first ride was May 12, pretty sure I did mostly walk and a bit of trot for 7-10 days; then started introducing super short canters. Trot poles and crossrails came pretty quickly and we went to our first horse show over itty bitty jumps at the end of July. By October we were comfortable at .80m. She had a ton of time off over the winter, basically no jumping and all flatwork when I did manage to ride. This spring she came out ready for the .85s after legging back up and by June we were consistent in the .90-95s and have been dabbling in the 1-1.05m this summer. I think you’ll find she comes back very quickly since she’s going back to her old career, not learning a whole new one (like racehorse to jumper). She sounds LOVELY! Pics please!
Edited to add: I am very much a DIY ammy. My horses are at home and I am a one-woman show with all of their care and farm chores, etc. Some weeks I’ll have time to ride 5-6 days, other weeks I don’t ride at all. More often it averages 2-4 rides per week. Obviously if I have something on the calendar I will prioritize riding, but I am by no means consistent. It’s not ideal, but it’s the best I can do. It helps a ton that my horses live mostly out in a herd. They’re also all TBs who keep themselves pretty fit being utter hooligans.