Yes, this is right that cerelac has more sugar and carbohydrates. It may be a good idea to start on home made cereals like suji, daliya, moong dal khichri and banana. You could start these cereals one by one. At 7 months you may give her 1 or 2 semi-solid diets and gradually increase, so that by one year she just has milk twice and rest all semisolids.