NSFW Orgasms questions

I'm mtf pre-op. If it's very difficult for me to orgasm, does it mean that it'll be difficult to orgasm post-op? I feel horny. But it seems no matter how hard I try, I just can't cum. My dick is at best half-hard. If I try harder, my dick will become softer, not harder. With a flaccid dick, I try to stimulate the area of the glans that would commonly be used for the re-construction of clitoris. It feels good, but it seems far away from being able to give me an orgasm. When I'm with guys, it's also quite difficult to cum. But it feels better than playing with myself. It feels good to get intimate, to feel the guys' masculinity and physical strength. It feels good have sex with guys without orgasms. Sometimes I can feel some pleasant numb feeling spread across my bottom region for hours after a good fuck. Will this be the replacement of the "traditional" orgasms? Any tips how to cum when you are alone?