"If Human colonization is possible on the Moon , will Mars be
colonised in the near future?"
If you made an expedition to Sahara (the Moon), then you'll probably learn many things about operations and such which is useful in order to make an expedition to the Antarctic (Mars) next. But I think you'd have to redevelop almost all of your equipment from scratch, at least:
Transfer spacecraft - because of 100:1 travel time Mars:Moon.
Landing system - Mars has an atmosphere and twice the gravity.
Surface habitat - temperature variations are smaller on Mars. Gravity load differs by a factor of 2.
Energy (solar) - the Moon has 14½ Earth day long nights. Mars surface has about 1/3 the solar intensity per square meter.
Communication - from the Moon, Earth is always in sight and 1½ radio second away. But Mars is on average about 1,000 times further away and rotates to hide line of sight.
Resources on site - Primarily water on the Moon, primarily methane from the CO2 atmosphere on Mars. That's fuel for two different rocket engines or surface power plants.
Self-sufficiency - a Moon mission can be recalled to Earth, or resupplied if prepared, within a few days. That takes up to 2 years for Mars. Real-time remote control is available from Earth to the Moon.
Setting up an infrastructure for going to the Moon would make it cheaper and more useful to go to the Moon again. The cliff between going to the Moon or going to Mars, in the eye of the commercial/settlement people, would increase with every new investment in the Lunar infrastructure. While it would facilitate going to Mars, it would facilitate returning to the Moon even more in the early stages. On the other hand, if science and enthusiasm takes the upper hand, then the opposite effect would dominate and the relatively lesser known Mars would become more and more attractive and valuable. We'll see where the money is, I think I know ;-)