Help: first time having sex feeling super self conscious

Adriana

So our relationship is still fairly new but I really like this guy and I don’t know if I’m ready to go all the way but i want to do stuff. I want to let him touch me but how sorry I’m very self conscious about my body I’m a bigger girl. How do you get passed that? He seems fine with me but Im nervous about taking my clothes off. He wants to finger me and eat me out and I just am scared that he’ll change his mind not find me attractive. How do you get over that? Being comfortable enough to take your clothes off? Also I’m so nervous around him when we do stuff that i have a hard time relaxing and getting into the mood. I don’t really get when people say Jaír turn your brain off and be in the moment that’s o hard for me to do. Any advise please!!