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Superficial module with underground module in lava tubes,

There’s the potential of using lava tubes, tunnels formed during the Moon’s volcanic past, as shelters with access to frozen water ice beneath the surface.

First you would need to mine the abundance of resources on the Moon (Iron, Titanium, Aluminium, Silicon, Calcium, Magnesium) witch would require metallurgy but a more immediate plan is to build a habitat using lunar regolith, the fine dark balsaltic grey sand that is similar to volcanic sand on Earth.

To find water we need to extract the frozen water ice beneath the surface or mine the ice on the poles of the moon.

To begin with, astronauts will need to bring food and drink supplies.
And for long term use lunar greenhouse’ – a hydroponic system.

A lunar day is also around 29 Earth days, which means two weeks of daylight followed by two weeks of darkness – an issue for solar power. Any new technologies for a lunar outpost must therefore work under these conditions. So we could use a lens or mirror to focus sunlight onto the ground.

You need to extract the oxygen from the lunar regolith the top layer of dirt and rubble on the moons surface.

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Using lava tubes to build a shelter underground would protect the astronauts from meteorite impacts, cosmic rays and solar radiation.

First and foremost the moon has one-sixth of the Earth´s gravity so straight away the astronauts would have to do allot of exercise to compensate for that fact. Second of all the moon´s atmosphere is extremely dangerous so most time spent would be inside the base where the astronauts would go by there daily business