It is not really inherited, but since it is in your family, the chances of getting it is very high.
What to do? Start now to avoid other risk factors like obesity, sedentary lifestyle, excess carbohydrates or sugar intake.

So I advise you begin to do moderate exercise if you are not overweight. But if you already are overweight then you may increase the intensity of the exercise so as to loose weight. Watch your diet, increase fruit and vegetables intake, proteins too and reduce carbohydrate intake, also reduce sugar intake.
You can also check your blood sugar levels and see your doctor for advice