Struggling with scales in every key

[MetalPlayer]

Hey everyone, I could really use some advice on learning scales. I've been stuck for a while now. I can play the C major scale and understand the pattern, but when I try to apply it to other keys, like E major, it just doesn't click. My friend suggested to just remember the shape, but I'm finding it hard to connect everything. Do I need to memorise every note on the fretboard? Any tips would be greatly appreciated!