Novice connecting electric guitar to UR12 playing through Macbook Pro

I’m trying to get my electric guitar to properly connect from my UR12 to my Macbook Pro and play thru GarageBand.

I have the USB Driver installed and my MBP recognizes it when the UR12 is connected to it, and I have my electric guitar connected to the UR12 thru the Hi-Z port, but no sound is coming from my MBP.

I do not have Cubase installed - license issue being worked on…

I am very new to the UR12 and using Audio Interface, so please excuse my lack of knowledge.

Regards,

Jim P.