You've set a very sensible goal, and as others have said, small changes should do you a lot of good, and you should be able to achieve your goal.  As well as eating less though, if you want to get rid of 'belly fat' specifically, exercise is a good idea - you don't have to go crazy, just try to walk more each day, take the stairs instead of the lift, etc - just get a bit more active, and you should see results, and