Only "harder" content (e.g. Savage, EX, etc.) needs you to go out and find a group.I kept hearing about them, but I just never found a group to do it with, I figured I'd play the newer raids to easily find a raiding group.
I'll do Eden first then go back to the Crystal tower raid.
For normal level content (like the stuff B.K. and I are telling you to do), you just use Duty Finder to queue up for it as you would a dungeon or trial.