So, I found out how to rotate the camera without affecting the third person character’s own rotation. 3 things:
-
Under the Character Movement Component in its Character Blueprint, scrolling down to its Character Rotation Settings, I must check the box that says “Orient Rotation to Movement.”
-
Going over to the Class Defaults and scrolling down to Pawn settings, I must untick the box that says, “Use Controller Rotation Yaw.”
And finally, 3) I must go to the Spring Arm settings, scroll down to Camera Settings, and tick the box that says “Use Pawn Control Rotation.”
And the camera now works just like I want it to 
If anyone requires pictures of my new settings, send a message down below. Thanks!