Zoeee, don't forget that reading the main SAAFE site and using the search form to find topics on this forum are two great methods for finding out a lot about this industry. It's a lot to ask for someone else to teach you everything from scratch when there's tons of information available to you here for free.

For starters, you might want to try popping "agency" into the search form and having a read through some of the topics that come up as many of them will contain information that will help you in making a smart choice.