Here's the crib bumper set up in my room and after I added the razorback and monogram, cut from my Silhouette machine and applied with fusible interfacing. You might also choose to do this step before you assemble the bumper covers. I wasn't sure where I was going to place it at that time, so I ironed it on later.
I would say that this project would be at an intermediate level. The hardest part was measuring out all of the pieces for fabric amounts and cutting. Just give yourself plenty of time so you can work at a leisurely pace and take breaks when you need to. There are so many adorable fabrics out there and this is a great way to personalize your little one's room!