What is on your bathroom floor? Tile, stone, ceramic, linoleum...please re-post with more info.
If you have a linoleum floor, this tutorial is good: https://realitydaydream.com/painting-linoleum-floors/
If not, let me know, and I'll help you find something else!
Floor paint can be used on most surfaces with a good prep.
I just did this to my tile floor and and loved it!