That's awesome that you're taking yoga lessons from your daughter, Claire! It sounds like she's a great teacher who is helping you feel comfortable with the practice.

Another bit of heads up - if standing on one leg is not easy try butt clenches! For some reach with overly tight tendons I overlook the the butt muscle. I get into working on the thigh muscles thinking that's the problem when really it is lack of butt muscle strength. Don't think I'll ever be able to twerk (like why would I want to?) but as far as balance and standing one leg you really need those gluts

I have done yoga, and enjoyed it. I really should get back into it, it is great for flexibility. And yes, standing on one foot is hard. I am lucky now to get more than 10 seconds. I used to be able to hold the pose longer. Your previous instructor sounds like pill. They should never make you feel bad or single you out. Yoga is a practice, no one is perfect at first, or even second attempt. Build into it gradually. There are lots of online resources as well. Keep it up, I think you will come to like it more, and especially with Claire as your buddy/instructor.

Your daughter is as beautiful as you are.

I have found my twin! I've had the same tightness all my life that makes it very hard to sit in the Lotus position. Never could do splits. I could ace certain things but yoga is not one of them. Good luck, fine your own pace.
I forget the name of the tendon that goes from the hip to the knee, it's the one they have to get around when they replace your hip. After surgery the doctor came in to check on me and one of the things he commented on was the fact he'd seen some tight ones before but mine was the tightest, otherwise the surgery went great. I do need to get back to my stretching exercises.