Yes you will need additional help.
First it always helps to have older women who have already raised children (your mother, grandmother, aunt, etc.) around for support and guidance. They can help you by offering knowledge from their experiences. But most new mothers don't appreciate this help because the older women can be a bit of a know-it-all. But personally, for me it was wonderful because they understood what i was going thru and could offer me insight.
Secondly, you will need a group of girlfriends (preferably new mothers around your age and/or community) so that you can still have friends with something in common. Most mothers don't anticipate losing old friends, because they don't see to what capacity their cares will change. Everything will become revolved around your child and children in general, And making the world a better place for the next generations. So those girlfriends you used to go and have a couple of drinks with at nightclubs will change into moms from book clubs and playdates. And this will come in handy when you and your hubby want to go out for a night- instead of leaving your child with a stranger(nanny), you may leave him/her with another trusted mom.
Lastly, I don't know what you have done to prepare for parenthood. To be honest nothing can prepare you for the real thing. You can practice all you want on dolls and other babies, but it won't be anything like when your child looks you in the eyes and you Know that this little life depends soley on you. And you'll make that silent vow to yourself to do whatever it takes to make sure your child is alright no matter what.
Being a parent changes us in ways that are unimaginable and I can't predict what your changes will be; I can only listen and share what my changes were.
But I do reccomend you read a book called "Child Guidance" because it seems to lay down the fundamentals for child rearing and raising.
Note: it is a guide for parents who are Christian and want to raise up well-balanced children with good character, respect, honesty, purity, self-control, reverence, cleanliness, industriousness, economy, and courteousness.