Painting is easy! Talk to the people who work in the paint department, watch some videos on You- tube or Lowe’s website.
As a pp said , the prep is the most time consuming. Remove all switch and plug plate covers (keep all the screws in a little container), picture hooks etc. Take down window coverings. If you are putting back the same window coverings, just paint carefully around the brackets, you needn’t take them down.Move everything out of the room, or move the heavy things ot the center of the room and cover them well with tarps.
Fill all holes with premixed spackle. Unless you have major holes it takes very little product. Sand it flat after it is dry. You can use the little foam sanding blocks for ordinary homes and holes.
Start with the ceiling. Use an extension pole to make painting easier. If your ceiling is white, buy ceiling paint that is tinted. It dries white but the tint makes it easier to see where you have painted.
If your ceiling is popcorn finish, it will really suck up the paint if it has never been painted.
If you do have popcorn ceiling, use the ceiling paint to edge around the top of the walls. When you roller on the wall paint, you will have a straight line between the ceiling and walls.
Use an angled brush to edge the walls. It is easier to get a straight line. Buy a decent quality brush so you aren’t leaving hairs all over the walls, and smearing your paint job when you try to remove them. If you are not going to paint the wood trim around windows, doors etc, use a good quality frog tape to protect the trim. If you are going to paint the trim,do it before you paint the walls, then edge around the trim with the wall paint. It is a lot easier to paint a staight line on the wall than to limit the paint to a narrow edge of the trim.
Make sure you protect your flooring by covering it with painters canvas or heavy duty plastic. When we painted our last two rooms we were replacing the carpet with hardwood and it was so much easier not having to worry about getting paint on the carpet, because it was going in the dumpster!
Buy one heavy plastic paint tray and several lightwight paint tray liners. You change liners when you change paint colors-sooo much easier. You can do two coats in one day, just wrap the brush in saran wrap to keep it from drying out between coats.
When you open the paint can, use a hammer and a nail to punch a couple of holes around the rim so the paint drips back into the can instead of collecting in the rim. When you are finished, hammer the lid back on tightly and store the paint upside down. It stops air from making a skin on the top of the paint.
Never dip the brush into the paint more than 1/2 the length of the bristles. You don’t want paint collecting under the metal part of the brush.
It is totally do-able to paint your place by yourselves.