Yeah I think we need photos. You don’t want the lid on, they’ll suffocate. They have to be at a precise temperature at one end of the brooder and cooler at the other end where their food is. 6 chicks will outgrow that tub in a couple of weeks. And you will need a full sized coop ready in about 6 weeks. Check out the link pibb gave for the mama heating pad.The closet rod is at normal height, about 4' up, and the tub lid is on top of the tub to keep the wee birdies from flying out. If the closet rod were any lower the birds would get too hot. It's just about right for them now but as they get older I will start pulling the tub out of the closet, more into the room, away from the lamp so they won't be so warm.
And don’t panic. You have a lot to learn but we will all talk you through it. It’s gonna be worth it and so much fun!