I think it takes a special person to inherit a child, i don't believe in step anything, you're either their father or mother or you not. Every child deserves a loving family, mother and fatherThe Power of the Presence of Jesus (in the Holy Spirit) can have a great effect on even un-christian women. Practice the presence of God in your entire life and you'll be amazed who comes around.
Whatever you do, don't play games with a woman. If the one you want declines your advances and you bow out with dignity and grace it'll impress the mess out of her.
Understand going in that many of the women in their late twenties to mid thirties will have children. If they don't yet, they will soon. Being a (step) dad is a lofty office. On the negative side, some single moms will bend over backwards for you until you're hooked. Then their children once again become the most important thing in their lives and you are just the dude that pays the bills.
But prayer works. Even asking this fraternity to pray that you find the right one is a good step.
I'm praying for you now. God Bless.