Z51-70 alot of questions

[Iwillsolo]

Hello guys ...

i wanna make sure that everything is going to work fine with my laptop so i got some questions

First of all my laptop is Lenovo Z51-70
CPU: I5-5200U 2.2ghz
iGPU Intel HD 5500

dGPU:AMD R9 M375
Ram: 8GB (will raise it to 16GB)
HDD: 1TB stock one
SSD: 120GB (for my games and windows only)

now i investigated  a little about eGPUs and found that i need a M.2 or thunderbolt, i've found that my wifi card use a M.2 a/e key aka ngff, so i will be using the GDC Beast NGFF version

to the bad part / question part

What do i need to know other than the stuff above?
what is the white-listing thing? i found on support forums that my laptop support some wifi cards only and it's bios cann't be modified according to bios modifying forums (not here)
in same time saw some posts on reddit that says if ur bios have UMA graphic option then you will need to disable PAX / WIRELESS and enable UMA and it will work fine, the question is that true?

i wasn't able to find anyone who did it on Z51-70 i found only 1 post on reddit for Z41-70 (which after research found that both are using same M.2 a/e key slot and also same bios... but the one who posted only replied that it's recognized with some errors and never replied back with any updates so still not sure about it.....