Anjee, first of all, will you please not use all capitals in your posts? On the internet that means shouting, and I'm sure you don't mean to shout at us!
You can't delete anything, so don't worry about that--only moderators and administrators can delete messages or threads. (A thread is a series of messages all linked together--these posts of ours about JTR are a thread.)
As for the camera, the "practice" time you set it up should be out in the lobby of the newsroom by the stairs--the place where you always go when you choose the newsroom. After you've set it up there and taken it back down again, the next time you set it up will be over by the railroad. You don't need to try to set it up in the newsroom again...