Climaxing?

So I just bought my first vibrator a few days ago and I’ve never masturbated before so today I finally worked up the courage to try it out while I was in the shower. Literally brought myself to my knees, and it felt amazing! I was up to the point where I thought I was going to explode but I didn’t. I’d find a good spot and right before I go over the edge it fades. Any tips or advice? I’m super new to this.