How to dissessmble casing and other components

Hello again. I needed some advice before I start ordering parts and tools. I’m currently deployed and had my Asus Rog take some damage. Currently it looks like the screen is broken which would be an easy fix, however the casing is cracked and damaged as well. It looks like I’ll have to take the entire thing apart.

I’ve seen a video on how to take some of it apart but I’m not exactly how I’m going to replace the bottom portion. I’m guessing I have to take the motherboard out along with everything else and put it on the other casing.

I also would like to know some precautions I should take to avoid further damage. I know I need to take out the battery before messing with power supplies and what not but I’ve never done an extensive job like this before, only with screen replacement and hard drives. Any tips will be much appreciated.