@Kegaten I'll give you some details but novel chapter 112 is the real big start of it if you don't count side stories (read the whole thing its adorable)
no big spoilers but Lefi very quickly becomes the most adorable thing in the dungeon by a wide margin.
@IsaacBai cardboard translations has the best and most fun read of it. I think novel updates list them anyway so just go with them they are good. Beyond that start at like 30 if you don't like treading old ground not sure what the right one is but 30 sounds right in my head. (Basically I'm too lazy to actually check)