If you want to take a shower, you should turn on the water and let it run for a few minutes until it gets hot.  

Once the water temperature is right, get in and get yourself wet. Use shampoo to clean your hair, and then rinse it out.

Rub soap all over your body and then rinse yourself off.

Turn the water off and get out of the shower.

Use a towel to dry yourself off.

Dry your hair. Then brush your hair and get dressed.