As an absolute beginner, you may be only months from turning into a seasoned pro. Most lists have a digest feature that sends all the day's messages at once, a good way to reduce mailbox clutter. I also send a message to the listserv with simply the word HELP to learn what such features are available. Here's the basic way to search the Internet. I tend to bookmark index or sitemap pages that outline where to find specific topics or agencies.
Many local sites give links to Chicago non-profits.
The Internet is great for getting regular news fixes. Stephen Rynkiewicz is a Chicago Tribune Internet producer.