There has been a lot need to document, it seems that I need to start this part.

First of all, household main water shut off.

There are two main water shut off:
The first one is located by the meter and it needs a special tool to shut it off.

The second one is normally located inside, this video provides plenty of details.

Here some of the fixing videos

The second one is normally located inside, this video provides plenty of details.

My old video on how to fix the tub faucet.