Feasibility and difficulty of replacing keyboard

This looks like a job so challenging it may not be worth doing - there’s no guide, the battery is glued in, and I’ve seen reference to the keyboard being held in place with something other than screws. I’ve replaced a lot of SSDs, DC-in boards, logic boards etc, but this one looks hard enough (if possible) that I’m really hesitant. I wonder if anyone has done this (without replacing the whole top case)? My client did order a keyboard here, but that’s as far as we’ve got so far. Any opinions welcome.