For a man with high testosterone it is nearly impossible to become fat. And very easy to get lean or shaped.
High testosterone has many benefits like:
- Higher muscle mass
- Higher energy levels
- Improved cognition
- Decreased risk of osteoporosis
- Increased libido
- Better insulin management
Consider intermittent fasting: http://www.nerdfitness.com/blog/2013/08/06/a-beginners-guide-to-intermittent-fasting/
Eat more zinc, vitamin D, eat less sugar – in short start a paleo diet – http://www.nerdfitness.com/blog/2010/10/04/the-beginners-guide-to-the-paleo-diet/
You will get fitter and happier. Signing up for a gym membership and starting to lift should be considered, big pectoral muscles and a huge biceps are better than a six pack!