I�m a bit confused.
You say you have no dependants, but then go on to say that if you die your parents and sister would not cope financially. Does this mean they are dependent upon your income?
Among the biggest problems that families have when somebody close passes on is the lack of a valid will. Whatever the deceased does have cannot be readily distributed, and when it is, often ends up in the �wrong� hands because of the intestacy laws. Taking out life insurance will not overcome this, as the benefits payable become part of the deceased�s estate.
To ensure that an income is provided for your parents and sister in the event of your demise will cost you a tidy penny. Is this really what you want?