Good luck with your life changes. It is possible. Start with one change at a time and chose the change that is easiest for you to make. Success will help you stick to it. I was realizing yesterday (because I'm at a conference where we're talking about change) how long it has taken me to get to where I am today. 10 years ago I was overweight and thought that a block and a half was a long walk. Now I'm at a place where activity is a natural part of my life and making healthy choices when I eat isn't a chore anymore. I did it by making one change at a time and getting used to that before moving on to something else.
Also keep us posted with how you're doing. Having a group to offer support is always a good thing. All the best