It's good you're thinking about this early! Searching through the forum for old threads will give you a lot to go on. And definitely start drafting as soon as possible, it gives you plenty of time to edit, edit, possibly rewrite the whole thing, and edit some more. The more people you have read it, the better, both people you know irl as well as some of the readers on the forum on are extremely helpful. And just remember in the end it's your PS, so you don't have to take advice you get unless you want to, and good luck!!!