Depending on how “big” your belly is for you. Usually if the belly is obstructing you from getting up, lay yourself on either sides (left or right) then use your arms as support to sitting position, legs down on the ground then up. But actually, just do what is comfortable for you, there is no “specific safe” way. 😊
easier to be on the side and prop yourself up into sitting position with your arm. my bed is also high so i’ve a stool for me to step and get off the bed.
Whatever feels comfortable to you is the right way. But you can try getting on your side first and then using your arms.
I had the same prob since my previous pregnancy. I figured out a trick by grabbing one of my knee and pull myself up.