I 20F have recently got out a long term relationship with my ex 20M and need advice on a new relationship that’s upcoming.

Hey, abit of back story i 20f broke up with my fiancé of almost four years 20M the end of January this year. That relationship was my first proper one in my entire life he was my first everything including sex, now the problem is since splitting up with him I’ve realised how selfish he was during sex he only focused on his needs and pleasure and never bothered with aftercare, I have never orgasmed due to this sorta selfishness. NOW I was checked out the relationship for a solid 3 months before breaking up o had tried ending stuff the first month into the feelings loss but I was pretty much forced to give it another go that’s besides the point though. I have met someone and boy have I fallen hard for this man he is 22M and he treats me with so much care and respect which is new to me, he is so gentle and funny andd smart BUT I am so insecure about my body I have no confidence when I’m naked. We aren’t official yet but we been talking about it and we have both agreed to take everything slow with me just getting out of a serious relationship and him having some past problems but when it comes to sex I’m scared, I’ve only ever been that vulnerable with one person and what if something as stupid as me not moaning enough is an issue. I don’t think I’ve ever rlly felt proper pleasure from my ex id make the odd noise here and there when he hit the spot but I’ve never had anything special go on and this new guy has spoke to me about how he wants to go down on me and how he loves to put the other persons pleasure first as he is into it and stuff like that, I know it’s gonna take a while for it to all occurs but I can’t help but feel anxious about it and I’d feel stupid talking to him about it because it seems like such a stupid fear to have. The point of this post is for some advice on the sex side?advice on getting my confidence back? and advice on a new relationship when you’ve only ever been with one person properly like that?