What are some fitness routines I can do in the house and what sort of things should I eat?

I can’t go to my local gym (my mom ran one of the instructors over) and I don’t have time travel far because I’m studying. What are some things I can do in the house? I’m trying to get in shape so I can start feeling better about myself and because I’m going Jamaica next year and I want to look good! Also what are some things I can eat to keep me healthy?
122lbs… damn..

Think HIGH protein/MODERATE fats/LOW carbs. That will get you in shape.

If you stated your weight I’d be able to tell you exactly how much of each to eat.