There are many paint sprayers available on the market for DIYers, although brushes and rollers used to be the standard for painting walls or cabinets.
Like anything else, each approach has advantages and disadvantages. Think about the following.

You must first prepare the room by taping off any surfaces you don’t want painted and putting down plastic sheeting to cover your furniture and floors. Put some paint on your roller, then pour paint into your tray and begin painting.

Fortunately, you don’t have to finish the work all at once.
The advantages and disadvantages of using a paint roller and a paint sprayer, respectively If time-saving advantages come to mind right away