This is an interesting prompt. Critically it seems like you definitely aren’t omnipotent, so whilst you can try to influence and teach the new inhabitants, there’s nothing stopping them simply ignoring you and doing something else.

Rather than some wanting to just not contribute, I’d be more concerned by a group deciding to focus their efforts on building weapons and simply taking what they want from others.

Fully automated luxury gay space communism is certainly an ideal, but it is extremely vulnerable to hostile forces until it gets large enough and willing enough to excert eqivalent force in return. Hostile forces can be military, ideological, or resource limit based. Responding to all of those, is a massive challenge.