Each person's story and journey of handling diabetes is different. One thing which is mostly common is that with good diet, lifestyle changes, exercise and medications, most patients could lead almost a healthy lifestyle.
Insulin can be injected into the fat just below your skin with a syringe and needle or a penlike device that hold insulin with a needle attached.
The main thing to remember is that both are as serious as each other. Having high blood glucose (or sugar) levels can lead to serious health complications.
Regaining weight must be under dietician observation with balanced nutritious meals.
Diabetes when uncontrolled can cause sudden increase in blood sugar level causing an emergency called Diabetic ketoacidosis which can be life threatening if not treated in time. Also, long standing Diabetes may lead to organ damage which can be fatal.