Almost 5 years ago I was 34 years old and weighed 535 POUND! Read that again.
I currently have lost more than 50% of my starting weight; I weigh 260 pounds. Dropping pounds, at any age, takes determination and hard work. I'm currently a proud member of Sparkpeople.com and it's a great place to lose weight. I don't get anything for mentioning this other than the fact that they've helped me lose my last 60 pounds. My user name is BillAlex70 if anyone wants to go check out some 'before/after' pictures.
Making small changes that you can live with is the best advice I can give you. Restriction only leads to binging and 'falling off the wagon.'
You can lose what ever you want but, you'll have to work at it.