I kind of understand you on this one. I'm 17 too, and up until a few months ago I'd never thought of shaving. I was waiting for that big "father-son" talk, and the whole cliche 'shaving with dad by the mirror' thing.
Not knowing how to shave properly, I stuck to dry shaving; so no shaving cream or whatever. It was alright, for a time, but it always left my skin pretty rough.
So, I wiki'd shaving, to see if it had any tips. There was nothing useful. But, lately, I've gotten into the habit of shaving while having a morning wash, or in the shower, since my face is already lathered up, so why not use the opportunity?
Anyway, what I'm getting at, is you don't need experience to shave. Everyone shaves in different ways. My dad uses shaving cream and his razor, and stands in front of the mirror every day or two, for a few minutes while he shaves.
I use soap and water, a disposable razor, and whenever I think the hair is getting too 'unsightly' I'll shave it off.
One of my best mates keeps an electric shaver by the side of his bed, so he can keep the hairs down completely. He stayed in my hotel room on a school trip, and he used it when he woke up, every day.
To each their own. All I'd say is, when you do shave, don't go "down, across, up, down..." or whatever. Keep the strokes all the same. Pretty much, what I do is, anywhere from half-way up my ears to my chin is a 'downstroke', and anything under my chin is an 'upstroke'. It seems neater to me, plus it's easier than being all over the place with my razor.