Since your space is so small, you want to use every square inch for your benefit. Developing a space for wallet and keys is a significant place to get started.
If space isn't a very major concern, then two individual beds may work too. For instance, the space underneath the beds can be the storage.
The attic is the best space in the house to function as a functional room, like a bedroom. It is often the easiest place to add onto your house.