I think it can be better to get into climbing a bit with ropes, with a mate or at a course at a wall etc before bouldering as it can be quite intimidating learning to climb when even a 4ft fall could break an ankle if not done properly.. Also it can be a bit hard to work out what is "climbable" if you haven't some experience, so visiting a bouldering field can be a bit frustrating. And I think that most of the problems -99%? in the Peak bouldering guide would be very difficult for somebody brand new to climbing..
Having said that, if you head of to Burbage South or somewhere you could also have a lot of fun just having a go at anything that looks like you could climb it.. At first don't be too bothered about using the guidebook though, execpt to find the crag, just climb anything you fancy.
Have fun.
