i am looking for a good, basic yoga workout or other similar physical activity in which to start off. i suffer from fibromyalgia and want to regain some strength and help alleviate my muscle tension and pain. thanks!

I’m trying to decide between 2 classes being offered locally: Kundalini Yoga and Hatha Yoga. The course descriptions make Hatha sounds a bit more kinetic, but since I’m new to all this I really don’t know which is best. My goal is to reduce stress and muscle tension.
By the way, I am NOT looking to lose weight.