I saw a wooden weave flooring solution somewhere, and want to apply it in my bathroom(4m X 6.5m). Any suggestions on how should I proceed?

Start with a flat sub-floor of ¾ inch plywood or better. Visit a showroom and talk to the salesman. Pre-finished will work, if you are careful with water spilled onto the floor. An engineered type of flooring will be note stable with moisture changing environments like bathrooms.

Any type of flooring you can use for your bathroom so you can use wooden weave flooring for your bathroom.