Thrilled and Overwhelmed

I'm just over 5 weeks pregnant and I couldn't be happier. I've wanted to be a mom for as long as I can remember. However, I'm already finding myself getting overwhilmed by all of the things I need to do and choices I need to make in the next 9 months. From choosing a doctor, creating a birth plan, preparing nursery/home, etc. Fun things too like cute announcements and an awesome baby shower. I guess ultimately I'm worried about making the wrong choice or not having things "perfect" for my little bundle of joy. I want to offer him or her the world but what if I fail? That's a rhetorical question. Though I didn't expect to already be experiencing fears like this. I haven't even had any morning sickness yet. Any suggestions, reassurance, or encouragement is welcome.