Shawn, there might be tidbits written here and there on faction sites and The Guide, as Ellias said. By far your most reliable source would be to speak with someone who has experience in the game, and whom you trust to be impartial, about many of the roles available and how some roles actually work in the Combine. Example: the most common misconception new players have is about the bounty hunter role. That's really just because of which game features are actually implemented at this time and the social dynamics here. Though a brief conversation with a knowledgeable individual can very easily clarify roles such as the one above. I recommend you speak with a knowledgeable friend, if you don't have that then feel free to send me a DM and I'll do my best to help.