As with the 8 steps to successful troubleshooting you’re learn already, do not assume that a short course and a book or two will make you into the networking equivalent of Sherlock Holmes. Take the time to learn one or two aspects of networking very well before seeking the next topic. Feel free to ask for help or guidance with everything else in the mean time. This approach will help you avoid making many of the common blunders.
The first suggested step in troubleshooting is to gather information. If you do not know what normal operation is like, and you do not know the technology used, and then it is difficult to gather information and symptoms about the current failure effectively.