Take a look at this post from @One Day... that explains the geometry of shooting off sticks.
https://www.africahunting.com/threads/practicing-on-shooting-sticks.48755/post-527005
Lots of good info on that thread too.
That’s a good diagram. I will add with a 2-stick style, I lean the sticks toward me a tad, grab the sticks with most of my hand and loop a finger over the barrel and keep it all together.
keeping the sticks far forward on the forend is a must. I’ve seen guys put them just forward of the magazine and wonder how they even stay on target.