I've been on this way of eating for 3 years. It's really really easy.....after the first few weeks!
It is a total mindset shift - fat doesn't make you fat, you don't really need to watch your calories, especially at first, and also everything in our society is set up to eat junk so you occasionally feel a bit of a freak.
Seeing as you have read the book, you will understand the process that your body will have to go through when you start to get it fat adapted and withdraw from glucose. It can make you feel quite poorly, genuinely a cold turkey withdrawal feeling but so long as you are expecting it and know it is short term, people get through it.
It really is worth doing it, I am a member of many groups and the success rate is phenomenal. Have a look on Reddit, Facebook (Keto UK Community is the biggest) and get some support from people also doing it, see the amazing progress pictures.
Meal plan. Use Diet Doctor or Ruled Me. Chuck out every piece of junk you own. Get electrolytes, especially in the withdrawal process. Don't worry about exercise in the first few weeks / months- unless you do it already.
I wish you all the best. It really is a life changer. My quality of life has improved expodentially since going on this way of eating. And obviously I am now super slim and it really is no effort.