Great response and pic! After rotator cuff surgery on both shoulders prone is no longer possible for me and I started shooting like this 4 years ago. It's a great way to go! I have also gone to a bipod with 27" of extension.If you have a hunting pack with you, you can try try to use it for support by lodging it in your arm pit. Something like the image below.
photo credit:
https://www.gunsamerica.com/digest/bag-tricks-use-gear-stabilize-position/