Only about 30% of women orgasm from vaginal sex. I'm not ashamed to say, I've faked orgasms in the past to spare the feelings of my partner at the time. I'm now with the father of my unborn child and though I don't always orgasm from sex, I do more than not. It could just be that he doesn't know your wants and needs yet, and your just learning yourself. He has to work with you.
Not many women get an orgasm just by penetrative sex.
Your partner needs to do a lot of foreplay to arouse you and may have to stimulate your clitoris, breasts and other sensual areas for you to successfully reach a climax.
You may find lubricant gels and sexual toys may help.
Best wishes.
He needs to understand it's not your fault or his and relax. It's a learning experience. You can help give him tips from what you have learned. Intercourse may not do it. It depends how your nerves are located or something.
Your partner needs to understand that most women don't have an orgasm from vaginal sex. And women who can have an orgasm is normally done from clitorial stimulation. But even some woman can't orgasm from that.