Use lots of bones and bone fragments, put a bit of vinegar in there and let it go as long as you can. 12 hours did it for me. I had lamb bones, duck bones, turkey tail bones and some beef bones too, and it hardened up firmer than jello. Chalky and white! My first try failed, too. I did what you did. One big bone. No-go. Need more little bones!
Steak, eggs, potatoes - fruits, nuts, berries and forage. Coconut milk and potent herbs and spices. Tea instead of coffee now and teeny amounts of kelp daily. Let's see how this does! Not really had dairy much, and gut seems better for it.