I actually finished week 1! I am in shock, I really didn't think I would be able to do it but I did. It was so hard the first day but already it is easier, I actually quite enjoyed today. A friend is keen to start doing it next week - I like the idea of company, would it be a bad thing to do week 1 again? I think it would do my confidence good and it would be nice for us both to be at the same stage.
For anyone starting out, just go and do it, it really isn't as un-achievable as it may feel!