Internal medicine specialist or Diabetologist.
Few fruits are oranges, melon, berries, apples, bananas, grapes and are to be taken in moderation, also in fresh form.
Diabetes affects nerves which reduce one's sensitivity to pain from wound leading to repetitive traumas, wounds can get infected which may not heal fastly due to reduced blood supply. Sometimes, a bad infection never heals. The infection might lead to gangrene and amputation.
Any form of physical activity including yoga can help in controlling of blood sugar levels but may not cure Diabetes mellitus entirely.