I'm a single mom, how will I know how to raise a boy?

Children. There is no handbook to correctly raising children. You can make it easier by reading a couple of parenting books and magazines but love, affection, and setting rules early and often will set the tone.
Yes. You can utilize many other male sources, such as fathers, brothers, brother in laws, uncles, and other male friends. Many men would love to share male bonding with your son.