How did the Meccan and Medinan periods in Islamic propagation distinguish themselves, and what is their relationship to the the Islamic methodology in preparing a Muslim and building their character?

This question requires an explanation and elaboration that are not suitable for a fatwa. One should refer to books of Seerah (Prophetic biography), Da'wah (invitation to Islam), and Tarbiyah (Islamic upbringing) jurisprudence, such as "As-Seerah An-Nabawiyah" by Dr. Ali As-Sallabi.