Sex sex sex sex sex!! Your thoughts please?

Ok so I've decided that I'm ready to have sex. I'm 20 and I've been waiting since I was 12. I can't say I was waiting for the right guy because I honestly don't expect a fairy tale. I never believed that i should wait to find the special one. All I really wanted was a respectful man that I knew my secret would be safe with. No strings attached. SO ! I finally found this mann and he is AMAZINGGGGGG. I have no other attachments to him except for sexual ones. Whenever were together I always enjoy myself. He makes me comfortable and he is so respectful. I that he was the type of guy I wanted to loose my virginity to just by the way he treated me. Kind of like I was his child. Like he didnt want to do anything I didn't like or wasn't comfortable about. He asked before he did ANYTHING. Even if it was just a kiss. He askednif he could take my pants down, lick me, even asked to take my panties off. He's in his 50's and that is such a turn on. I love it. So yea he's the one I wanna have sex with. I know he will be gentle and slow and do everything possible to make me feel comfortable. But just a little heads up what should i expect how long will it last and how bad will it hurt. By the way he fingers me and I use tampons