I need help to lose weight?

So I've been trying my hardest to loose weight so I can go into the Air Force as a linguist, but I always have difficulty and have no one to support me with my decision and to encourage it. Also I've been going through a difficult time at home with my father suffering from a stroke. So my question is what are good eating habits to have and exercise programs that don't require me to give an arm and a leg? Also I eat chicken sandwiches all the time if that'll help along with Tator tots and a sweet iced tea. Please keep the criticism to a minimum, preferably none though. Thank you.
I need help to lose weight?
Post Opinion