Best fat burning exercise

Some people like exercising vigorously. I’m no such people, in fact I’ll work up a sweat just looking at people exercising! Yes I know I’m bad at it, I need to get off my butt and work out more. Got to get rid of some of this extra fat around my waist. I need to know the best fat burning exercise so I can just concentrate on that and forget about the rest. Would that be enough for me to keep fit?