Going to an arena

Hi I am going to an arena for the first time in a long time and I am going with my best friend I am very excited but nervous too. I do not really know what to expect. The arena is in Manchester too which brings back some bad memories. We are going to see Sttictly Come Dancing. Can anyone help with what I can expect, the things I am most worrying about is queuing at the venue and finding our seats. Also the bag policies are very strict I worry about bringing the wrong things but I will need some things on me like my comfort plush and my headphones and my mum said to wear the sunflower lanyard