Advice...

This is my first pregnancy and my husband and I are very excited to meet our little one in October, but I'm also pretty nervous. I grew up with a very small family so I haven't been around babies much. I keep hearing, "things will just come naturally" is this true? Currently we just have our set everyday routine and even though I'm happy it's hard for me to picture adding a baby to it. My husband has many younger family members and loves babies. He is confident that things will be fine and we will figure it out but I'm still struggling with being nervous. I guess I'm just curious if this is common first time mom jitters? Thanks.