I’m not going to do a full internal configuration, but here’s a scaling shot, plus flank detail updates.
My working assumption for internal configuration and usage is that the front main portal is split – one side has 2x levels of TIE rackmount, and the other ~1/3 of the bay by width handles launches and recovery of lambda-sized shuttles. Basically most of the front 1/2 of the ship is dedicated to hangars, or workshops and barracks for crew. Within this range, the bottom hangar is full length and width, roughly. This main bay would have access via the main port forward, two flank ports (can be configured to launch TIEs, with recovery via front port), and a ventral access that can handle another set of TIE launch positions. Above the main hangar is a storage deck (behind the front detail above the main port) with elevator access to the main hangar – space up here can be used for auxiliary craft smaller than a lambda, but basically anything goes.
Blue = 36 TIE/ln and Blue/green = 36 TIE/I in 2 levels of rackmount. Green = 4x Lambda. This alone is the published complement of the ship.
For additional scale, light green = 12 StarWing, Yellow = Skipray (landed), and red = stormtrooper transport. All of what is shown (which doesn’t fully use floor area of the storage area) fits into the forward third of the ship. Middle third internal volume is still totally open.