So, let me see if I am getting this straight:
Supporting a teacher or sangha through service, donations, and advertisement (fliers). Organize an event if there are none locally.
If qualified, teaching meditation and/or dhamma talks
Offering exposure to the dhamma to those who are accepting, while working from a place of compassion and a desire to alleviate suffering
When asked, answering questions to the best of one's ability, adding clear qualifiers when uncertainty arises.
Forcing dhamma in a way that would cause anger or defensiveness
Working for conversion, larger sangha, more donations, or other self aggrandizing goals
Teaching beyond one's understanding of the dhamma, or mis-representing one's level of realization
What are the credentials for teaching? Can a lay follower teach a few basic concepts and basic meditation techniques if they feel comfortable and confident?
Sotthī hontu nirantaraṃ - May you forever be well.