Actually, a very quick, direct punch to the nose is not a bad beginning at all. Makes sense to me. You'd do much, MUCH better if you had someone who knows what's doing to SHOW you how to do it, though. There's more to throwing a good punch than people realize. I know this because I'm not very good at it.
I know there's a very good MMA gym in your area, but I can't think of it. Either New Pride (guys from the old Lion's Den) or someone else.