Informational interviews are a key to career research. These interviews are cornerstone to career change for two reasons. First, by talking with people who already work in jobs or fields that interest you, you can better understand what that work is really like. This allows you to reality test your ideas and clarify whether you are actually on the right track.
Informational interviews are a beginning of a new network.
Should you decide to pursue a job in that field, you already have a list of names of people who may be in a position to assist you. Identify a job situation. Know your accomplishments. Know the questions you want to ask. Encourage questions about you.