I only use paint sprayers indoors during new construction. Before any flooring is down or the doors installed, I prime everything with a sprayer (walls, trim, ceiling) at once. Then, using a shield to protect the walls, I spray the ceiling. Then the walls. The trim is then painted with a brush.
I would never use a sprayer to repaint a room. It takes a LOT of time to prep for spraying. When you consider the time and materials to prep a room for the sprayer, prep the sprayer, spray the room, and then clean the sprayer I could have painted the room with a roller, had lunch and probably taken a nap.
Roll it. it will be cheaper and easier in the long run.
Agreed, I sprayed new construction. I roll on remodels. I can roll a typical bedroom in a very short time. You'll want to watch a you tube video on the how to do so. Lowes and Home Depot also have classes at times. If you're wanting any kind of fancy finishes you will definitely, roll, sponge or brush depending on the cool look you want.
Be sure to clean the walls with a little dish soap and water a day or so ahead of time as grime tends to accumulate over time.
Painting is a skill like anything else so there will be a learning curve. Start in the closets. Be prepared for drips and spills and use plenty of drop clothes.
On color selection it may be worth it to pay for a professional home interior person who specializes in paint to help you choose colors. It might cost you a few hundred but IMHO it is well worth it. Other than the fancy finished rooms IMO people shouldn't really notice the paint colors so I usually go with a white with a slight brown tint, often called "China White."
Buy good quality paint and good quality tools. Especially brushes and roller covers.
The rolling technique is a skill. So watch the videos carefully. Use a 5 gallon bucket with a side screen, not the trays.
I don't tape much as I am pretty good at cutting in with a brush.
Prep is very important and may take longer than painting. Cleaning the surfaces, repairing drywall, removing cracked caulk and caulking, sanding.
I find it best to paint on sunny days. You can paint at night with super bright lights if you like. On the walls where you like to colors, I find it easiest to remove a 1-1/2 inch sample and have the paint store color match it.
It also seems that paint manufactures over estimate their coverage. Seems the "covers 300 sq ft usually does 250 sq ft."
You can clean your rollers and store them tightly in a plastic bag if you will be using them soon enough. Be sure to clean your nice brushes very well.
Be sure to have the stores shake the paint but then always stir if you aren't using it within a few hours.
Flat ceiling white for ceilings, egg shell or satin for walls, semigloss for doors and trim.
If you are repainting standard doors, it helps to remove them and lay them flat on some supports in the garage. This avoids runs. Doors tend to get drippy where the panels come together. (like on 6 panel doors).
By the time your finish the house you will be a real pro!
That's probably too much advice! lol
Happy Painting!