Hello Mommby and Welcome!
First, you have taken an important step by joining this community. I am a relatively new member. I was a "lurker" hanging out and reading without joining for a while before I put in my first post. This is a really good community with a lot of expertise and support.
I am no expert but you have asked for advice so I will share what I did. My journey started with a diabetes diagnosis. Scared and shaken, I started medication and a lifestyle change.
I started by writing down everything that I ate. I started making small changes and moved to a diet that has small portions of lean protein and carbs, and eating lots of leafy green, and very low carb veggies. I try to avoid all sugar and processed carbs like pasta.
If you have all those gaming systems you have a great resource for starting excercise in baby steps. I started with 15 minutes per day and I thought I was going to die because I was so out of shape. If you are walking a mile, it is way ahead of where I started so good for you! I recommend the free run on the wii - you just walk in place and you can go as long as you want.
Well, I hope this helps. If you choose low carb, calorie counting, or whatever plan you choose, I would just recommend moderation and slow, sustainable changes. Again, Welcome!