I think you should start with eating right and walking. Set yourself a goal of how many minutes you should walk a day and stick to it. I don't know how easy or hard it is for you to walk, but you could start with 20 mintues a day and after a week of this, you could bump that up to 30 minutes a day and so on. The eating: I start my day with veggies and egg whites or a healthy oatmeal or a soy hot dog. I then have a snack around 10 a.m., which is either a protein bar or a protein shake (I like Jay Robb's whey protein found at health food stores). Lunch is usually a low carb tortilla (La Tortilla Factory) that's only 50 calories, a soy protein Boca Burger (100 calories) and salad with no dressing. Then, I have another snack around 2pm...usually a protein bar or nonfat greek yogurt or laughing cow cheese w/ corn crackers. Dinner is usually chicken with veggies, but sometimes I like to have Lean Cuisine Pannini. I know it's not that healthy, but it's a nice treat. If I'm still hungry, I'll have some fruit or some baby carrots.
I suggest you figure out how many calories your body burns if you do nothing. This is called your Resting Metabolic Rate. You can do a google search and figure out your amount. Then, you eat just a bit less than that and you exercise as well. I highlly recommend writing down everything you put in your mouth...even if you don't want to count calories. It helps you know how you're doing, because it's so easy to forget all the little extras.
I hope this helps you a bit.
