[quote=@redbaron1234]
I'm sorry if it seems like I need someone to hold my hand here, but I have a question. I don't know how collaborative posts work. Like I don't want to have to post single sentence posts just to have a conversation with another PC, and it would be nice to work with someone. If anyone would be willing to help me with this, especially on bringing my guy in, it would be greatly appreciated. This is my first RP ever, so I am trying not to commit a major Faux Pas right off the bat.
[/quote]

Well, the best way to go about it, would to have your guy emerge onto the scene. There's plenty of chaos right now. Decide what players you want to go help, and join them. 

Communication doesn't have to be a one liner, I think only two of the players are collabing, the rest are free-styling this mother. 

Read a few of their posts, it should give you a very clear idea of how to write one. 

[Action]

[Dialogue]

[More action]

[Sassy dialogue]

[Fluff]

[Yet more action]

They usually follow that kind of format.