Also the surface temperature seems to be -68.15C (avg) - typical Syberia, only there is no atmosphere and sufficient gravity and magnetic field to protect from radiation.
All you need is a couple of meters of water or earth. The base would be inside the comet at complete safety anyway, and detection can warn you to get inside in case of increased sun activity.
It is really easy if you have just a little material:
Nobody is going to walk on it naked. The conditions on the comet are amazing compared to the ISS, which is currently supporting life.
The comet has everything you need, water, organic material, shielding from radiation, decent size, raw material, energy.