Pardon the mea culpa...my suggestion that Mr. Arentz places too much emphasis on sensitometry is based in the context of someone who "managed to read too much information regarding this process and succeeded only in confusing" himself. If reading another book seems like the thing to do, I'm all for it. There is indeed no such thing as too much information...except when using it to spend too much time theorizing and not enough time practicing.
I'll stick to my suggestion, however. Buy a small kit, and learn the basics first. There is as much intuition and feeling involved in Pt/Pd printing as there is technicality. Good luck, and enjoy your adventure.