Welcome and good luck! You'll do great
This is by far the easiest 'diet' I've ever done. Granted, I'm still a newbie (I have my first weigh in tomorrow!) but honestly, the first week was easy as (dare I say) pie!
I didn't have any bad side affects (no head-aches/fatigue/anything) and I was honestly FULL since day #1!
Having such a strict and rigid plan leaves you with no worries or grey areas. Follow the plan and it will work.
I peeked at the scale this morning, and while it's by no means official, I seem to be down 7lbs my first week. We'll see what the scale at the clinic says