The SSE Arena is a maze. Seriously, I've seen grown men cry trying to find Block 208. Here’s the secret: the entrances are called "Doors" and are numbered. Door A is for the lower tier, Door B for the upper tier.
Your ticket will say "Entrance via Door B" or something similar. Follow that sign like a homing pigeon. Once inside, look up at the giant hanging signs. They are your friends. Trust them.
Seated Seating Plan - SSE Arena Wembley
The Queue for the Bar
Okay, this isn’t on the seating plan, but it affects your experience. The bars near Block 111 and Block 225 are notoriously slow. If you want a drink fast, walk to the bar near Block 106. It’s the "express lane" of arena drinks.
Also: the prices are criminal. Expect to pay £7 for a warm plastic cup of lager. You’ve been warned.