It is possible, but you should first make sure that the existing flooring is stable and that the surface is perfectly flat. You will need to sand the upper surface down to raw wood.
Recommended adhesives: Class R2 adhesive (e.g. Keralastic Mapei) or R2T (e.g. Superflex Kerakoll)
How to make a floor plan:
With the help of a tape measure, measure the long side and the short side of your bathroom.
Create a simple drawing and write down the measures.
Also add structures: doors, windows and sanitary items.
If you want you can also add measures for doors and windows and their distance from the wall.
If you want to remove any sanitary ware please mark with an X.
The more information you add, more accurate your bathroom will be.