Parenting can be scary and a challenge, just remember that no one does it perfectly and we learn as we go. That said, we can choose to be the parent we want to be and the kind of parent we want our children to be. Some things I felt helped me when I was raising my children:
Consistency, this is key! One of the best things you can do for your children is be consistent. It will give them peace and direction.
Consequences - Today, it seems, many parents aren't willing to let their children suffer the consequences of their own actions, but it is good for them. Don't put them in harms way, but if they fail at something or have to apologize it will be ok.
Lots of hugs - Never decide they are too old to be loved on! Hold them, touch them, and love them. No one ever said "She loved me too much". In balance of course.
You're the expert - No one knows your baby like you do. Don't be afraid to listen to your gut, inner voice. Advice can be helpful, but it can be overwhelming and intimidating too. Take it with a grain of salt, but don't be afraid to ask for advice either. After all others have walked where you walk.
Lower some standards - Once you have small children it's ok to make fewer fancy meals, go fewer places etc. You'll get back around to those things, but remember that you don't have to it "all".
Me Time - Remember time for yourself! I love the story of John Wesley's mother who had so many children and no space that the only place she could be alone was under her apron. When she put her head under her apron everyone knew to give her space. You may not need to put your head under your apron, but be encouraged that quiet spaces and times can be found in all sorts of places.
Most of all, have fun! Enjoy this sweet time.