I am not confident that the world will remain a hospitable place for life until we are ready by your standard.
Getting the resources and people there is very close to being within our technical capability. The task ourselves, if we perform it, will take care of the remaining gaps.
Creating a self-sustaining colony outside of the Earth's environment is going to need a lot of work, but it is not work that can ever be achieved on this earth. We have to actually put people in space to achieve this. Our best experience so far is with submarines. Academic research has so far yielded only farcial frauds like Biosphere II.