Here's a link with the basic steps to painting a room:
Before choosing a color, be sure to purchase paint samples. paint them on several walls and look at them in different lights - daylight, night time, etc, for several days. paints do not always look like the swatch!
If you have to prime your walls (if you are going from dark colour to light) ask the paint store to half tint your primer with the paint colour you want for the walls.
Depending on the color that the room is now you can use a paint and primer combo, unless you're going from one extreme to the other. There are a lot of good combos on the market right now. Ask at the paint store and get small sample sizes to try out the paint color to make sure you like it during different times of the day. The most important time of course being when the room is most used.
One tip I didn't see listed is to use a dry swiffer and dust your surfaces before you paint. It's so much easier than any other way to clean them.
Prep work is key to a successful outcome. Here are some step by step instructions that explain in further detail.
Do not skip washing the walls with TSP. Even a room that "looks" clean, trust me it isn't. To speed up the drying process, use portable fans. And give yourself enough time to complete the project.
https://www.architecturaldigest.com/story/how-to-paint-a-room... great post
Here is a post I wrote on how to paint a room. https://lifeonsummerhill.com/painting-a-room/
Hi! My biggest issue with a room that can't be completely emptied, like a bedroom, is protecting and working around the pieces I can't move. Painter's tape, plastic sheeting and drop cloths are necessary. I usually move everything to one side, and then when that side is done, I switch. Don't go right up against the freshly painted wall. Of course, if you are able to empty the room, life is much easier! Hope that helps!