Simple Nursery Ideas??

Hey ladies,

I'm looking for simple (or any) nursery designs. You see, my partner, me and my 12 week old daughter live in a tiny apartment with 2 small bedrooms and I never got to do up a nursery for her. Well hopefully soon we'll be moving to a bigger place!

Her cot is in a room with our treadmill, cupboard and my partners bike and stuff. So it looks horrible...

It'll be a fairly sized room, it'll be a rental so I can't paint. I'm planning on using re usable stickers for the wall (the walls will be white/ beige). Please, any ideas will help. I would love to see yours!!! Thank you!