A side note, weights....to do or not to do while trying to loose weight. Nothing major as I can not afford a gym membership. I have a set at home.
Muscle weighs more than fat. But muscle burns calories even when you're sitting at your desk.
You should really adopt some cardio first to get your lungs and heart working at their optimum. Then once you're comfortable with that, and maybe seeing some early results, take on some casual weight training too! Weight training is much harder if your lungs and heart can't perform properly.