I'm going to show you the odd things that happen:
- when drywall doesn't sit flush
- when the hole isn't perfectly square
- how to match up texture
- measure tape
- utility knife
- drywall saw
- drywall screws
- bucket of mud
- drywall tape
- 6" joint knife
- 12-14" joint knife
- sander and sandpaper or screens
- mask and goggles
- cans of spray texture (if needed) purchase twice as much for the square footage you need
- plastic, tape, newspaper, old sheets (as you see fit)
- primer, paint, paint brush, roller (as you see fit)
To cut drywall, take a sharp utility knife and score the top from one end to the other. Stand the drywall up and bend it. It should snap in half. Then use your utility knife to cut through the back.
Measure the width and length of the hole. If your hole isn't perfectly square, you will want to use widest measurements and trim it to fit. (shown below) To cut out the can, measure from the side of the hole to the edge of the can and mark your drywall on the back. Then measure the width of the outside of the can (mine is 6 1/4") and place another mark on the back of your drywall (6 1/4" for me) from the first mark. You CANNOT measure from the outside on all four sides of your can unless the hole is perfectly square and the drywall is already cut to fit. Then measure from the back of the hole to the outside edge of the can and place the mark on your drywall piece. And mark the width of the can. Extend all the lines to make a square and the round the edges. Gouge in with your utility knife to make a slot large enough to fit your drywall saw then use the drywall saw to cut the rest of the hole. You can also use an oscillating tool for this step but it will make a lot of dust.
There are also small humps where I taped the seams (which is unavoidable). Spread mud onto the center and drag the large spatula over the length of the tape keeping it as level as possible. Then hold the spatula parallel with the tape and lightly drag the mud away from the hump and fan it out. You can also fade it by dragging the large spatula diagonally across the hump. If this is the first time you are mudding, keep the coats of mud thin and do several coats to avoid having to sand between coats.