KimberlyV,
Most low-carb veggies are green, with a few exceptions: alfalfa sprouts, arugula, asparagus, bamboo shoots, bean sprouts, broccoli, brussels sprouts, cabbage, cauliflower, celery, chives, cucumbers, endive, green beans, greens(all), kale, lettuce, mushrooms, okra, parsley, peppers(green only), radishes, scallions, sorrel, spinach, wax beans
Actually, apples are not the best in terms of carbs, but rather: cranberry, strawberry, raspberry, blackberry, peach, orange, melons, grapefruit, lemon, lime
Some people do fine not paying much attention to what they eat at all. Others do fine counting calories. And others are helped tremendously by looking at their carbohydrate intake. We all have different genetics, medical histories, etc., and all need to find what works best for us.
Good luck!