I would not recommend giving your bubs fluoride yet (I manage a dental practice and this is our recommendation). We suggest to start at about three as they don't really need it at a young age. Even then, we recommend half the recommended dosage until about six years of age. If you brush their teeth well from the day they get their first one and get in to a good routine of good brushing, they shouldn't have any problems. As suggested, only give water to drink (other than breast milk or formula of course!) and no juice, cordial, soft drink or flavoured milk. If they do have these drinks, brush thier teeth straight away! Every state bar Qld has fluoride in their water which is a big help (so those living in other states needn't worry about suppliments if they drink the water) and once they start using toothpaste (2 yrs +) it should be one which contains fluoride (unless they have a reaction to it). Hope I have helped, otherwise speak to your dentist about it.
My babies are all grown up sad