In dire need of help, need a way to lose weight and keep it off?

ok so im 21 and ive finally decided that its time to get in shape the problem is im in a death circle lol to put it bluntly i broke my leg when i was like 15 so it kills me when i run so and i need to lose weight to make it stop hurting. and im in a situation where i eat what i can get and its not healthy usually im not looking for some miracle diet or weight loss pills i just don't know how to lose weight the right way . i would go to the gym but i don't really have money and would bother everyone asking what i should do . any help would be greatly appreciated i really want to start my life right