1-2 hours of exercise is good, but if you have trouble breathing i suggest you start excercising like for 1 hour a day, then slowly increase your workout so your body won‘t tire itself out.
Eating a good healthy diet is always best, especially if you are looking to feeling better healthwise, or looking to lose weight. An unhealthy meal a day wont hurt, but maybe try to keep a clean diet so that not all you are eating is junk food.
How much a human has to sleep is approximately 8 hours a night. If you are young i say you should sleep at least 10 hours a night for your body to Keep growing.
