I have a 2014 Macbook Air with 4GB (bad decision on my part cause i was a clueless kid) and it's lagging like crazy now so i really wanna try and see if i could find someone who could upgrade the RAM before deciding to just buy a brand new laptop.

I'm perfectly aware that the RAM is soldered on the motherboard but I've found several videos showing how this is still possible (albeit difficult and risky).

Most repair stores I ask refuse to risk it so I'm just wondering if anyone here knows anyone who's done this before?