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Watch any of the videos on terraforming Venus by Isaac Arthur on YouTube.
A brief summary of proposed methods and their feasibility and a link to further literature may do a bit better at getting your point across than the name of a youtube channel that close to 0% of the people reading this are going to seek out at your say-so.
See above.
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With no magnetosphere would there even be a point to terraforming?
A strategically placed powerful magnet outside Mars can protect from the solar wind. There is an orbit that places the orbiting body always on the line between Mars and Sun. Place a superconducting magnet there that generates a few Tesla. Due to the distance from the planet, even though the magnet will deflect more distant particles to relatively small angles, this should still be enough to keep Mars completely in th…
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How can a moon civilization support itself without the Earth?
The Moon has abundant iron and aluminium. Carbon and hydrogen are possibly an issue but capture a comet or two and that problem goes away. I'm not sure what the state of phosphorus is but luckily we don't need all that much of it. What would we need from Earth? What would be economical to ship from Earth?
So the moon colony needs to be capable of making the things to go and capture a comet, and more comets in the future to replenish supplies, to support itself. That's a very large civilization.