Many lists also allow you to get a digest version. Once a day you get a single message containing all messages posted over he last 24 hours or so. You can skim this digested version at your leisure. Directions on how to request a digested version would be found in the original welcome message. You will want to observe what types of topics are discussed and what the tone of the list is.
Some lists are formal and polite.
Others may be quite confrontational. Lurking first ensures you do not violate the list s culture. When you decide you are ready to participate, send a short introduction message telling the other members about yourself and your interests. Postings should respect the list s tone. Post only messages that relate to the list s topic.