I've been going to Pilates for years. There's different types so do take up the offer if taster lessons. Some are mat work, others include reformer beds and other equipment. Some are more active and introduce some cardio work whilst others favour slower movements, but nonetheless work the parts that you never knew you had.
Every class I've been to has been mixed ages and good teachers adapt their classes to your ability.
I wobble if I'm off the ground so the teacher gives me a different exercise that does the same stretch but is safer for me.
It's helped me with my IBS, my spinal problems, I've found abs I didn't know I had, my thighs no longer rub together and I've begun to do some cardio which I love. I'm certainly more flexible than I was and its helped with strengthening my leg which I damaged last September.
As you can probably tell, I'm a real convert to this form of exercise and can't recommend it enough.