as long as it shows oil pressure and it goes up and down with engine RPMs.
Don't trust the gauges to be accurate, just keep an eye on how they behave,, and if they start acting differently then worry.
As long as the fan kicks in, temp drops 10-20 degrees then kicks off again, then cooling system is probably good.
(my first oil gauge read 0 at hot idle, and never got above 30. Second one with new sender read about 20 hot idle, and 50 high RPM. Current sender reads about 30 hot idle and 60-65 cold oil at moderate RPMs.)