Hi Purple Haze,
If you feel this way on your 1st day I would say this diet isnt for you. If you think you wont stick it then try a different diet. I wouldnt say this diet would suit everyone.
I would suggest, as others, have already to go on the Cambridge diet - I was in 2 minds myself wether to do this or the Cambridge diet myself, but for me, I'm one of those all or nothing people. I cant do things half heartedly but I would bear in mind that after you're in Ketosis it does get easier and you wont be hungry because you'll have changed from burning glycogen (carbs) to burning fat which we all have plenty of. So the real question is what sort of person are you? If you think you wont stick to it then dont try - change to a different diet. It's quite an expensive diet to not give it your all.
Good luck whatever you choose to do.