On the main page hit the bottom tab and you will see pin new to start. It creates an instant blank note without having to shuffle through notebooks. Note that its a quick note. I use it for quick thoughts.
Also when you use speech and say note. It records your information and stores it on one note.
I love one note. It syncs all my notebooks from my surface to phone and vice versa. I use it for all my recipes. Can't live without it.