The Public Auditorium is kind of a weird venue. It's not what you think of as a traditional music venue or theater; it's more designed as a convention space. The space itself is very long and narrow; as you can see from Google Maps, the building is about twice as long as it is wide. The main hall takes up most of the space, and the stage is on the south end. There's a main floor and a balcony that goes all the around around the other three sides of the hall.
The floor space is completely empty - no seats. For Rock Hall events, it's normally filled with tables for VIPs and high level donors. Public seating is normally limited to just the balcony; however, because of the shape of the space, you're either going to be close but all the way on the side, or center but very far back. There are a good number of seats, at least, although sections closet to the stage are likely going to be reserved as well.
Also, don't get confused about the "Music Hall" at Cleveland Public Auditorium. That's a completely separate space in the same building, more of a traditional theater layout, which hasn't been used in decades.
Floor plan and technical details:
https://www.clevelandconventions.com...-Floorplan.pdf
Setup from 2012 induction ceremony: