I based Quinn's room off of the Pottery Barn Kids Haley Collection. We only bought the bumper and then did the rest ourselves! Unfortunately we're renting so we had to deal with ugly green carpet and an interestingly shaped room. We chose a color for the walls that wouldn't clash too bad and incorporated the bedding. I have much better ideas in mind for when we have a place of our own!
I love trees and the owls are just too cute!
Definitely do it yourself projects, don't exactly know my style though.
Pace yourself and don't make anything permanent until you have all the essentials. I am a big fan of target merchandise for the price, same goes for IKEA. I would say take a few days, to just focus on DIY projects. When you are distracted, it's hard to finish things, especially if you are on a roll with good ideas!
It's so simple! You'll definitley be alright!