I also wonder if if your heart is really into it. You REALLY need to want to do it and not go in half heartedly.
On your first day you should be so inspired that you would be buzzing and not tempted by biscuits.
SW is fantastic, that you can have those biscuits but not the whole lot and syn them!
You really need to decide if you want to do it or not.
Just imagine how good you will feel when you lose weight. I promise you that being slim beats the taste of any biscuit or chocolate!