Proper tire pressure for my bike?
Your tyre suggests 40-65 PSI, so that's a good start.

The lower pressures are much more likely to pinch-flat as the rim bottoms out on the ground, if you're riding over a rock or lump or kerb/curb.

For your weight, on a MTB on the road I'd aim for 50-55 PSI, and vary it by a little to see if it feels better or worse. 

Generally the rear wheel is holding about 60-70% of your whole weight, so it makes sense to add 5 PSI more in the rear.  Again, try and see how it feels for you.