May I ask how to decorate the kitchen and bathroom on the left and the bathroom in the middle of the

According to the bathroom layout you described, it is possible to use the bathroom without a door, because there is a wall in the middle, and inside the wall is the toilet and shower. Either you can choose not to tear down the wall, and just make a door directly against the wall. If the wall is demolished directly, then only glass can be installed as a partition, and the glass should be labeled with glass stickers to protect privacy.

When you turn on the hood, you won't gasp when you open the window.

This has nothing to do with the thickness, it depends on whether it is a load-bearing wall. If the non-load-bearing wall is not able to hang the water heater directly, you can only hang it on a shelf. >>>More

If there is a need for lighting, you can hang a crystal curtain, but if it does not involve lighting, you don't need to.

If possible, it is recommended that you install the doors individually. Because the kitchen and bathroom are used to absolutely opposite purposes, it may not matter if you are used to it, and outsiders may feel uncomfortable when you see it.