I'm On The Thicker Side and Need Help

✨Kayy🌻 • Sweetest Most Blunt Person You Can Know
When it comes to sex it seems like I'm either lying down or taking it from the back. What are ways to let your partner know that you would like to be on top? An if he does let you how do you go by not crushing him with all your weight? And where the hell is it best place  to have it at where your both are comfortable and not uncomfortable ?