It's a great start. You may find as you become more active, you will want to eat healthier snacks as your body will start to crave it.
Nothing wrong with the odd piece of chocolate to kill a craving.
Perhaps with the soft drink, stop keeping it in the house? If you don't have it in the house then you will need to drink more water or perhaps have an apple or grapes for the sweeter craving?
It's tough going at the start, keep it up.
There is a thread for the Summer 2010/2011 weight loss challenge, see if you can get some ideas, or join in!
Good luck BM.

Summer - Autumn 2010/2011 challenge #3