We should settle both Mars and Venus.
Venus is more problematic. Perhaps a micro-biological approach to capturing the sulphur on the planet.
Mars two should be seeded with biologicals that would help prepare the planet.
Wouldn’t hurt to crash some comets into Mars both to Mass for atmosphere retention, increase water, and help warm up the planet.
First the moon.... Send our worst criminals on a one-way trip to the moon and occasionally ship them air, water, food and construction materials and see what they make of it.