Drywall is easy. Hardy Daytona & samsamsam outlined the process.
You'll need a utility knife, lots of extra blades (worth the couple bucks, working with a dull knife sucks), a straight edge (a metal yardstick or framing square), drywall tape, drywall screws, a screwdriver or a drill with screwdriver attachment (cordless drill is well worth the money to rent, you don't want to be hand driving screws into your studs), drywall mud, a trowel to scrape the mud, sandpaper, a block of wood for a sanding block or an orbital sander if you're a high roller, a drop cloth so you don't fuck up your carpet, some of those paper masks for sanding so you're not sneezing out gypsum dust for 2 days, maybe a drywall saw if you're doing cutouts for outlets... I think that's it.
If a door's a standard size, you can buy a replacement at Home Depot that just drops right in. Pop the hinge pins, pull the old door, move the hardware from the old to new, put on the new one, push the hinge pins back in.
Cut out the bad part, cut a replacement piece on the studs so you have a solid base for the edge. You can buy a stud finder, but really, you're going to find a stud at the corner and the studs are probably every 16 inches starting from a corner. You're going to have to cut holes to match any outlets or switch boxes you find - better to avoid them if you can because it's a whole lot simpler to just avoid cutouts, but if you have to, it's not bad. Screw new drywall in place (screws go into the old studs), tape & mud to get the seams clean, THEN you have to apply texture to match the wall, if it's textured. I can't tell from your pic, but it looks like it's not textured. If it is, you can buy texture in a can and do the knockdown with a trowel. The dude at Home Depot can explain that.
And then have a beer. But don't invite the same friends from last night.
You'll need a utility knife, lots of extra blades (worth the couple bucks, working with a dull knife sucks), a straight edge (a metal yardstick or framing square), drywall tape, drywall screws, a screwdriver or a drill with screwdriver attachment (cordless drill is well worth the money to rent, you don't want to be hand driving screws into your studs), drywall mud, a trowel to scrape the mud, sandpaper, a block of wood for a sanding block or an orbital sander if you're a high roller, a drop cloth so you don't fuck up your carpet, some of those paper masks for sanding so you're not sneezing out gypsum dust for 2 days, maybe a drywall saw if you're doing cutouts for outlets... I think that's it.
If a door's a standard size, you can buy a replacement at Home Depot that just drops right in. Pop the hinge pins, pull the old door, move the hardware from the old to new, put on the new one, push the hinge pins back in.
Cut out the bad part, cut a replacement piece on the studs so you have a solid base for the edge. You can buy a stud finder, but really, you're going to find a stud at the corner and the studs are probably every 16 inches starting from a corner. You're going to have to cut holes to match any outlets or switch boxes you find - better to avoid them if you can because it's a whole lot simpler to just avoid cutouts, but if you have to, it's not bad. Screw new drywall in place (screws go into the old studs), tape & mud to get the seams clean, THEN you have to apply texture to match the wall, if it's textured. I can't tell from your pic, but it looks like it's not textured. If it is, you can buy texture in a can and do the knockdown with a trowel. The dude at Home Depot can explain that.
And then have a beer. But don't invite the same friends from last night.