You are overthinking it. When you have the energy, hit the workouts.
How many pounds is that anyway? Internet says 245? Unless you're 5'5" you can do a lot at this point.
People meant you don't need to exercise to lose weight, and that exercising while very overweight can damage your joints and body in other ways. But only certain types of exercise. Even very fat people can do powerlifting and similar non-plyometric things. I'd start the weight lifting for now, heavy as you can. Just avoid jumping jacks.
I always have ants in my pants, too. I have to get active almost every day or I drive my coworkers nuts.