How Do I tell My Boyfriend I'm ready

Me and my boyfriend have talked about sex but I'm a little scared. I've known him for a long time and been dating him for a month. I have a lot of body shaming issues and I'm a virgin. It turns out that he is too.  I just don't know what to say to him how to lead him to it without actually telling him. At 204lbs I'm not so pretty on the outside , at this point looking in the mirror is hard. He asked me if I wanted to have sex and I said yes. Got a response of " it's all yours baby" I just need help if u got any suggestions as to what I'm supposed to say plz comment!