A Question regarding tournaments

I have created a tournament for my team only. It shall take take place in some days. My three questions are:
(1) Can I change the name of the tournament?
(2) Can I switch the tournament from rated to unrated?
(3) Can I delete the tournament?
I am new to lichess and I hope that somebody can help me.

Yes. Go to your tournament, you'll find them here: lichess.org/@/mkunger/tournaments/created
and edit it

Dear bufferunderrun,
Thank you very much for your help. I followed your instructions and succeeded. You have saved my day!
Kind regards,
mkunger