All the best - just get started. I'm on day 3 now, I never thought I could do something like this but I just kept thinking 'what's the alternative?' A couple of times during the first day or so I thought 'well, I could just eat sensibly' and then I realised I've not managed to do that so far and I am just kidding myself.
This, so far, is a lot easier than you'd think.
This forum is a great support xxx