I have tickets for a big stadium gig and the nerves have kicked in so much that I’m now thinking of cancelling 
It very much is a bucket list gig but having never been to an actual concert before, I’m stressing over every little detail. To try and help me prepare please can anyone tell me the following, as well as any other helpful tips 
1/ if ticket states doors open at 4, is that what time to get there? I’m a wheelchair user with space and a seat in the dedicated area
2/ trying to figure out where best to park - limited disabled parking at the stadium so what time should I arrive there?
3/ will there be stewards to help point me in the right direction?!