Once the goal is created, it can be shared, but will not appear on our public interface until approved by the administrators. During this time, however, it can be chosen as a goal for applicants to avoid having to join more than one recent goal in a row, but you would not be able to do so due to moderation.
There is therefore no expectation in terms of headcount. On the other hand, in terms of content: only indicate a goal that is not objectionable (please avoid political, violent, 18+, etc. content).