Tips for riding (Cow girl/on top)

I’m not that experienced sexually. My Boyfriend always wants me to ride him, but I don’t know how 🤦🏾‍♀️. He also says it will feel great if I learn how to move and ride myself. He does most of the work lol. I’ve seen on a few videos on online where girls kind of like twerk their butts while riding. I cannot twerk and I am slim so I have a little butt. Can someone give me tips on how I can do this! I am desperate 😔😩