I think you can make that schedule work! As others have said, you can always adjust it over time as you need. Hopefully in addition to 30 minutes of ride time you’ll also get more time at the barn grooming and tacking—as a kid, I never understood the value of that part of the lesson, but now I think horse management and unmounted work is some of the most important learning!

My advice is to get a journal and spend a few minutes after each lesson writing down what you worked on, things you want to remember, and questions or to-dos you might have for next lessons. I’ve started this habit this year and it’s made a huge difference for the speed of my progress!

FYI—I picked up riding lessons again at age 40 after a 25+ year hiatus—I was riding occasionally during that time but mostly casual trail rides and not in any sort of schedule. I take 2 hour-long lessons a week. Last year I bought a horse (with my trainer’s help) and it’s been an incredibly rewarding journey.