Hi Susan,
Welcome to Minimins. I'm also on Cambridge and had/have a similar amount to you to lose. I'm 7 weeks in and have lost just under 2.5 stones so far.
CD is both the easiest and hardest thing I've ever done, but I'd say that for the most part the balance is tipped on the easiest. I'm on Sole Source so don't have to think about food, which has given me loads of head space to work out what my relationship with food is and work out why I use it for more than fuel.
Socially, it can be a very restrictive diet, but once you're in the way of it, it becomes second nature.
As long as your head is in the right place for starting, I'm sure you'll do great.
This forum is full of great people who will always lend an ear if you're struggling or have something to celebrate, so make sure you use us lots!
Good luck with everything and shout if you want to chat more.
Thelma x