Anyone know where I can get this quest?

Brotherhood T51-B Power Armor [3]

Although it's quite time-consuming to get.

I was truly disappointed aswell

I swear I felt as if I was going to cry ;(((

I have no personal experience, as I play on the console. I think that it solely depends on your laptop.

Look at your guns, and look at the DAM Icon. The gun with the most damage is the one I suggest you specialize in most.