A few years ago, I dove deep in to the breath.
Influenced by the work of Blandine Calais Germain, Tom Myers, and Leslie Kaminoff, I began to experiment with using breath to change the inner shape of our bodies, releasing tension stuck so deep that outside hands couldn't reach it.
Here is a little collection of breathwork classes for your enjoyment.
The volume on some of these is low.
I recommend using external speakers for an optimal class experience.
You will want a small square of material ( I like a 1 foot square cut of yoga mat, but a washcloth or dishtowel will do as well), and possibly some additional cushions, a stool or a ball for comfortable body positioning. A great rule of thumb is to ask yourself "what feels strained" when you take your first position, and consider if something around there needs propping up. So if your neck feels tight, maybe a pillow behind your head. If your hips feel tight, perhaps supporting the legs with a pillow or stool would be the right approach.
As usual, I remind you that I don't live in your body, YOU do.
Please be mindful of your practice consult a physician before embarking on any exercise program.