Your best bet is to get in touch with some of the raid leaders on your server. To get successful raids and keep people happy, my experience is they like to "train up" potential leaders so that the chance for success is at it's best. I recommend picking one of the tasks you think your toon fits best at, and talking to that team lead after the next raid on your server. Learning one task, participating on that team, learning what is done when, and then leading that task yourself at some point. Specific info is out there, it's just not in bright and shiny guides so that some new L50 doesn't think, oh that looks easy, I think ill run a raid next weekend! PUG raids with inexperienced leaders just tick people off.
"Null is as much an argument "for removing the cottage rule" as the moon being round is for buying tennis shoes." -Memphis Bill
You just have to know where to look 
Linkie
Each Server generally has their own way of doing it. They're all roughly similar (take out the mitos while using Phantom Army and a tank with a bunch of empaths to distract hami, hold hamidon, beat down held hamidon), but the details can be vastly different depending on where you are.
best bet is to find a raid vet on your server that doesn't mind explaining how things work.
I was looking around and I was kinda suprized that I didnt see an "attack" guide to Hammie.
Is there a posting somewhere of what is needed to do a Raid? Phases, Trips, Tricks, what powers to use, what powers not to use, etc.
I have done a few raids myself, but I wanted to learn more info on them.