First learn to orgasm by yourself through masturbation. That way you will know what an orgasm feel like, what form of touching, rubbing and stroking feels good, how long you need to be stimulated to reach orgasm.
Once you know this, you can tell and help your boyfriend to get you to orgasm. Don't be afraid to tell him exactly what to do. I am sure he will appreciate it as it will make him look like superman when he makes you orgasm!
Some lubricants have a warming feeling that make you more sensitive and can make it easier to orgasm. Other women does not get anything from these lubricants.
Remember that your clitoris is the key to your sexual pleasure. It is the single thing that needs to be stimulated continuously to get you to orgasm. The minority of women orgasm from just plain old intercourse because the mechanics of sex is such that the clitoris does not get enough stimulation during penetrative sex. After you learned to orgasm by yourself, you will know how to touch yourself while he is inside you to bring yourself to orgasm.