My experience has been very much like Mathew describes. Meeting sailors, getting advice, learn what gear, buy used gear.
From beginner to planing gybes and speed sailing now at medium level.
Problem for speed is lack of weight, i'll take some of yours thanks, i can't put any on i'm frothing too much and sailing all the time

One good mentor for the spot you want to sail will be able to tell you what to get, find the one and listen to them.