Its going to be tough for you to get good advice about slin. Its such an individual specific thing that no one wants to give advice on a product that can harm you. In all honesty, it should be titrated according to what your blood sugar count is. For example:
BS 150 or >.........10-12 units
BS140-150..........8-10 units
BS 130-140........6-8 units
BS 120-130........4-6 units
BS 100-120........2-4 units
BS under 100......No slin, take in more carbs then recheck BS in 30-45 minutes.
This is in no way a guideline for medical advice, just an example of what alot of BB'ers do. Yes, insulin is a very dangerous drug and i don't recommend it to novice type BB'ers. But if your dead set for using it, at least be smart about it. Yes, i know alot of BB'ers who do not even own a glucometer and don't check their BS, not a very smart thing to do.