Bathroom rennovation

Our bathroom is approximately 6 sq. m, and we are planning a complete refurbishment. We would like to remove the existing bathtub and replace it with a walk-in shower with floor drainage. The bathroom has two windows, which will need to be assessed as part of the renovation. We are also looking for a modern storage solution and would like to retain space for a washing machine. We are interested in suggestions for a new, functional, and contemporary design that makes efficient use of the available space. Current photos of the bathroom are attached for reference.