22 year old male trying to figure out sexaul frustrations?

Ok to start it off im a 22 year old male. I have a very high sex drive. I always want to have sex with my partner. Im not circumcised. One issue is that when we get intiament I get really hard at frist but when I start to get head it feels great at frist but then it feels like I have no sensitivity and starts to go limp. It doesnt go completely but it does get soft. Then I switch over to masterbating and it gets a little hard but not completely. I have read that not being circumcised you are supposed to be very sensitive but I feel its not. So I try and pull my foreskin down all the way which it goes without a problem and try masterbating it gets really uncomfortable. Ive read that if you masterbate a lot when you are young you get stuck in that mind set that your hand can only please you. Is that ture? So now to the number one question im looking for any anwser is if I was to get circumcised and complete healed and would that help with sex? My reasoning for getting circumcised is I know how to please myself with foreskin but if that was removed would I be able to start fresh and actually have a time where my partner could get me off with out me having to beat it? Cuz it would be a differnt feeling? Sorry there are a lot of questions in this eassy lol I never grew up with a male figure in my life so im trying to figure this all out on my own. Any advice with help. Please have serious respones im not just looking for "you have ED" thanks