Ok a total newbie here (started primal end of Jan 2011) I am also greatly overweight, started at 16 and a half stone, and from an exercise base of zilch!
I have started walking twice a day with the dog on the beach! benefits of living in NZ....I was born at Shepley, Dad's from Howarth, I went to College at Ilkley (before it closed, showing my age here) so I know your moors!
Then I picked one of the exercises from the ebook, watched the 'how to' link given and started. The first was push-ups. I stand in front of a wall and push myself in and out....now lean as yet. I have started squats, can almost get to the first number with them, hanging onto a pole that holds up the veranda. I am working on plank now, I can hold the front shape for 10 seconds, but cannot get into the side shape yet...but I'm getting nearer! Obviously I keep up the the exercises i have already learnt.
So now i walk everyday, and get up at 6am so that I can, and on Mondays and Thursdays when i don't do the school run I do the exercises.
When i have all 5 exercises underway I am going to start the sprints, on the beach at 6am so no-one can see this mad fat woman dashing up and down but the dog!
Hope this helps!