After sunset, find a clear view of the NW sky.
During twilight when it’s still semi-light, set up your camera on tripod facing NW. You may begin to see the comet yourself, or start taking some high-ISO test shots and the comet will likely show up on-camera before you see it with your eyes.
Set your camera for ISO 5000, F2.8, and around 3.2 seconds. Use a lens around 70mm.
Other important camera settings are:
Turn off Long Exposure Noise Reduction
Turn off Optical/Image Stabilization
Turn on Manual Focus
Take at least thirty 3.2” shots of the comet in succession.