Since updating Blender to version 2.91, I got kind of lost on how to scale a texture. Now, having said this, I do think I’m using this whole texturing feature wrong on Blender. I’ll have to really take some time off sometime to properly look into this, but for now, this works.
Anyway, in the Shader Editor (previously I used the Node Editor), I should arrange the nodes as seen in image above.
This is Mari’s note to herself. This note may or may not be useful for you. It is intended as a personal note, publicly shared in case someone else finds a use for it as well.