It depends on what you think the next questions are. Uncertainty about the truth of moral realism1, moral realism2, or anti-realism leads the inquiry in one direction. If one is satisfied with the meta-ethical issue, object level moral questions predominate - and probably must be approached differently depending on one's meta-ethical commitments.

If you are unsure about what the next step is, I might recommend reading Camus' "The Stranger" and examining what you think the main character is doing wrong - that should help you focus your interest on object-level ethics or meta-ethics.