Interesting question, I think the first planet we'll colonize is Mars; the first moon would be the Moon next to Earth. We would need advance technogly to be able to live in other planets. We wouldn't survive without food, water, oxygen, and your body would get weak if you don't work out. But to colozine a planet would take another 2,000 years or more in my opinion. At first, only wealthy people would be able to step on Mars or the Moon. It would cost a lot of money, to get the fuel to fly back and forth. It would take decades just to build a few structures on Mars.
Hope this helped.