Don't pay for extra exhibitions on first visit
I don't recommend paying extra to see the special exhibition if it is your first time at the museum. The regular collection has enough glories. The museum has a little guide that they give you with your ticket that contains all the most famous works in the museum, so it's a good idea to start by following that. Then you can linger on whatever strikes your fancy! Like any good museum, the AIOC also has free docent tours, so you can also look into the times for that when you arrive.