If you do not study the stage setting before reading a play, you will find it difficult to follow it. The stage setting gives information about the place and time of the play. It also gives information about how space is displayed on the stage. The location of the furniture and the location of the characters are stated in the stage setting, so this will give you the necessary frame to get into the play.
The first thing you should do is study the stage settings. This is commonly found at the beginning of each act and can help you understand the characters better, as scenery is often used to depict the characters' state of mind and way of life.