It's not a difficult repair, obviously it's simply a replacement of the coupler. As to the novice question, that really depends on the skill level in general, not something any of us could really answer.
With DCS, the coupler has solder pads right at the coupler, so you don't have to route the wires for the new coupler if you just solder them at the new coupler after removing the old coupler. The hardest part is you will have to pop the shell off and drop the truck to remove the old coupler and install the new one.
