Are you better off doing floors or walls?
The best way to start any project is by deciding on what you want to achieve. It is crucial to plan how you'll use the space, what people will use it for, and why. This will help decide if you want flooring or wallcoverings.
You can choose to put flooring in the first place if you decide to open up your kitchen/living space. If you have chosen to make this room private then you could opt for wall coverings instead.