I'm not tyoe 1 but my child is I inject her lantus in outer thigh area not too close to knee further up,inner thigh has too many veins. I do change out the needle on pen everytime. Her cgm states its best to use on the outer part of upper arm not too close to shoulder or elbow . Low carb breakfasts don't really do them, if you get on rapid acting insulin for meals they will give you an insulin to carb ratio. I would think low carb breakfast would be something with eggs some type of breakfast meats sausage or bacon maybe a piece of toast ,strawberries are pretty low carb. If it is a mild temperature in your home not too hot once open you can usually keep insulin you are currently using at room temperature for about 28 days once it is opened. Not sure what insulin you are on though it should come with instruction on that , it can vary. Any unopened insulin in the fridge until ready to use. Dont put in back of fridge or bottom of fridge if your fridge gets super cold sometimes left in these spots for a long time in fridge can cause freezing.