Certainly, drywall repair can be challenging for a novice. In fact, most modern homes have interior walls and ceilings that are made of it. Drywall is a building material called gypsum board. To explain, it is made of calcium sulfate dehydrate applied between two sheets of paper. Each sheet of drywall is 4 feet tall and 8 feet wide.
When installed, a sheet of drywall is held in place with screws or nails. Next, the seams are covered with paper and joint compound. If installed correctly, the drywall will leave a smooth finish without the appearance of any seams or screws. To clarify, this is known as a level 4 finish.
Once the drywall is finished, then primer and paint can be applied. Of course, paint provides color to the surface but it also protects it from moisture. Excessive moisture will soften the material which can lead to mold growth.