There are several different ways you can reach an orgasm. Through your clitoris, vaginal and even anal sex.
The easiest way for you to experience an orgasm, is through your clitoris! I masturbated with a BACK MASSAGER (I know), by placing it in the right spot and just keeping it there. It helps to use one that heats up. Heat makes it easier in my opinion.
During sex, it will become easier to orgasm if you have masturbated (so you know what to expect), and to stimulate your clitoris with your hand. KY lubricant helps a lot- get the kind that feels warm.
Basically, your first orgasm can be achieved easily by stimulating the clitoris. Try it! It will work!!!
Hope my strange advice helps...