Hey. That position can work for some people. It's generally not as effective or recommended though.( compared with the sitting or standing position based on research) I've heard that with the kneeling or push-up position, sometimes people wake back up due to convulsions. I personally believe that the push-up position with hands tied is more effective than kneeling.
You don't want to be found early FYI. Brain damage is a high risk if you're found early. If you do it right, it should take 8-20 min for brain death. I've heard that brain cells die by the millions around the 4 minute mark. So if you are found and "saved" at,say, 6 minutes, You're at higher risk of permanent brain damage. Becoming Quadriplegic is a risk as well. There was a guy in the UK that had this happen with full. He's in hell. You want to be alone for an hour or more if possible, to be safe. Sometimes the arteries aren't blocked as well and it takes longer to die. Just be careful please. I don't want you to be worse off than you already are.
I'm sorry for all you've been through. If you want to talk at all, I'm here for you.
I sincerely hope you find peace and happiness, and if you should attempt, that you find peace.