Being on top, HELP!

Okay so, my boyfriend loves it when I go on top and it’s okay with me, it’s just he literally does all. of. the. work. And I’m not okay with that. I try to do it by myself and try to get the rhythm but honestly, I’m a curvy girl, I have a tummy, my thighs are pretty big and it makes it uncomfortable. I watch ‘those’ videos to at least try to get an idea but when I try, it doesn’t work. I just don’t know how to do it and i feel like he would like it if I knew how to do it properly.

Does anyone have any advice or tips? I’m feeling kinda stuck in the whole dominant area of sex.

Below in a pic of me and my body, it’s a shocking photo but it’s just to give you a rough idea of what I look like, body wise.