To loose weight, the main thing is caloires in vs calories out. There are other factors, cardio, weight lifting even getting enough sleep. BUT caloires in vs calories out is the biggest factor.
You'll want to make sure you eat a reasonable amt of calories. I have 1200 a day to help loose weight, when I'm done loosing I'll go to 1500-1600, your a man though so you'll need more.
SO, to help decide what to eat, go by calories first, but also make sure your not getting those caloires from unhealthy sorces (candy, fattening meats, ect)