Yeah I realize you won't have a lot of those knowledge skills at the moment but don't worry. I won't let the game stall or die because you can't hit a check. As a GM I let failure be an option but usually plan an alternate way for you to overcome your failure that is a bit harder or costlier. That way failure is real but doesn't shut things down (unless there's a tpk...).
After your successful battle, you return to your various parts of the dungeon (healing up fully I'm sure). You have time to enjoy your new acquisitions and reflect on your new experiences.
Feel free to always provide reflections, interactions with other characters, etc between scenes. If it gets lengthy it can be kept in spoilers so the scene keeps going but two characters still have space for a funny philosophical chat.
Later that evening, Noxious finds you all again. "The high mistress has two more jobs for the lot of you. There's something in the refuse room. Seems large and hungry. It stays buried under the years of detritus but every now and then it snatches a goblin or something else. This annoys mistress so she has decided it will serve her as an undead. Kill it. Your other job is to make this first chamber more defensible. Mistress has decided that paladin fodder like you lot should be up front here. Do what you want with the place as long as official business can still pass in and out with no inconvenience." Noxious nods as if considering timing. "Get those done by tomorrow night." Then she turns to Goldslip with a smirk on her face. "Haven't you forgotten something? Better hurry or he's going to get spicy. You know the temper on that one." The quasit then flits back into the depths of the dungeon, doubtless busy with other administrative duties.
