Two types of very gentle yoga come to mind as something that can help you just be in your body, without thinking of changing anything. They are:

- restorative yoga
- yin yoga

They place no physical demands on the body and do not involve any strenuous activity, so you do not need to be in a good shape to engage.

I see you are in Texas, so your options and local offerings might not be as varied as in California (although Austin has great yoga studios), but it is worth trying. I think it would be the best for you now, because it is much easier than meditation, but yields similar benefits.