You arent bottlenecking, but your processor is weak. A better CPU would help in terms of FPS and upgrade paths, but the GPU will run fine with it.
I would overclock as much as you can.
Never use Youtube as a reliable source of information.
Bottleneck -> Only occurs when your processor is at or close to 100% Load, otherwise what's bottlenecking? A bottleneck is caused by the tasks set not the difference of specification.