Hi how do I join the raid is there lfr or do I have to manually form my own group then enter raid instance ?
There is no queue, and there is no minimum ilevel. This is organized group only.
If you look in Group Finder, you will find groups recruiting for BT. I see them in “Raids - Legacy” right now, but I would not be shocked to find a few listed in “Raids - Current” or “Custom” or even “Questing”.
If you talk to Vormu on the upper level of the central building in Shattrath, you can pick up the quest, and have an option to join the instance with your group.