How do you get to the release??

Hi ladies.

I'm new to orgasms. Recently my husband and I got a vibrator to try out and it's helped for sure. I can definitely feel intense build up, but before I feel like the orgasm really finishes, it gets unbearable to feel anymore and I can't go any further. I've heard some girls squeeze their legs together, but it didn't work. My husband says to just keep going and give in, but that's so hard to do because it's so intense and uncomfortable after a while.

How do I help myself get to the finish? Have I already? I haven't felt a release yet, just the intense build up, tingling in my legs, muscles contracting, etc. But then it gets stressful to continue! I really want to peak, but I'm not sure how to help myself along. Any tips? Experience? What's it supposed to feel like?

Thanks in advance