Right now I use a WiFi extender, but the workshop being metal tends to make the connection abyssmal. I'm thinking MoCA might be my best bet, but what should I look into?

Upstairs in an office I have the router (Xfinity, so input is coax). I can easily drop something into the garage, and run it all the wall to the workshop, but should I do

MoCA broadcaster in Attic, amp in garage, run a long coax to workshop, then MoCA Reciever? I was going to do similar with just an outdoor grade Cat6 and setup a switch over there but curious of easier/more reliable method; esp when the weather comes in.