My advice is to get the book and also read the Start Here part of the website. You're going to see a lot of forum posts about people doing some serious tweaking with ice water, IF (intermitant fasting), carb refeeds, etc and NONE of that should be crossing your mind until you've been doing this for a very long time and are trying to get rid of those last few pounds.
Just stick with the basic - no wheat or other gluten, no seed oils, no soy, no legumes, no chemicals or artificial anything. Eat plenty of good meat, fish eggs, vegetables, water, coconut, a little fruit and nuts. It's always sad to see a newbie get all caught up in the confusion of the Great Debates here and think it's just too complicated when it's really so very simple.
Depending on what you're used to eating, you'll probably get something called "carb flu" which will leave you feeling lethargic and just generally run down for a week or two. That's perfectly normal and actually a bit of a good sign because it means your body is swicthing from sugar to fat as a fuel source. It sucks - there's no denying that - but it's a good thing, and you just have to get through it. Don't try to lessen the effects by having just a little bread or something. You'll only drag it out indefinitely. Once you get through it, your energy levels will be a lot more stable and you'll feel a lot better than when you started out.
Also, you're probably going to lose a bunch of weight right away, usually water weight from cutting grains. Your body just doesn't feel the need to hang on to as much as it used to. Then you'll start losing more slowly. You might not even notice any changes on the scale. But this is all normal. I got super frustrated because the scale was not moving at all for a couple of weeks, but my boyfriend could tell that my shape was definitely changing and I was leaning up. And then the scale started catching up to what he was seeing and it was all good.
I think you're going to be surprised at how well it works.