How to take care of a baby (for school test in health)

Change your baby's diaper frequently, and as soon as possible after bowel movements.
After cleaning the area with mild soap and water or a wipe, apply a diaper rash or "barrier" cream. ...
If you use cloth diapers, wash them in dye- and fragrance-free detergents.

You hold it (but not upside down) with your right hand around it's waist, you feed it while holding it like that, you change the diapers, you talk to it (just because it is a small child and it won't remember doesn't mean you shouldn't deprive it of love) and most importantly DON'T LEAVE IT ALONE