Reverse Cowgirl tips

So a few days ago my bf wanted to try reverse cowgirl....I wanna try again but like how do I go about hand/leg placement, a certain angle I need to be at? We maybe tried for like a few seconds tops cause I was uncomfortable. I was hoping to not be such a novice but I am willing to try again as we do really only stick to like 3 positions and I wanna change it up a bit.