Start a session at the without a boss kill

[yolohse]

Hey I'm playing on classic and when we kill a boss i chose to award the loot later since we do all the loot at the end, but when we end the raid there is seemingly no button or command to start a session that it not a test. I don't understand that there isn't a command likie /rc start where you start a session

1. How do I prompt a looting session without looting a boss?
2. Alt click looting doesn't work for me. When I Alt left click an item it flashes a couple of times but is not added to the session setup
3. It seems like if I start the session before I have put the items in my own bags the awarding bugs and no matter how many times i try to award an item it is not announced or registered