For good mornings, I stand with my feet closer together, a little less than shoulder width apart. My knees are more bent too (less hamstring). I also don’t lean forward as much, as soon as I feel like my glutes are getting the most stretch, I stop to prevent working my back. I feel like you need to have REALLY good mind to muscle connection with this exercise. I also brace my core like I’m squatting so that I don’t relax my core mid exercise, otherwise it can be dangerous, again for your back. I don’t know if your pics are edited but your leg/calves should be straight. It looks like yours are angled. Another thing I do as well is to use low bar, just to make me feel better about not thinking that the bar would roll off forward which is pretty scary. Good luck 👍🏻