 This study investigates Indonesia's COVID-19 vaccination experiences, challenges, and acceleration over the course of implementation period using time series forecasting machine learning with administrative data and survey results. The findings suggest limited vaccine availability caused low coverage vaccination implementation in the early stage, but following increased vaccine availability, the vaccination rate accelerated up to 600% times. The government utilized strategic public places, public and private offices, and engaging private sectors in phase 2 implementation to accelerate vaccination implementation. With new strategies introduced by the government, it is expected that vaccination speed could further improve by around 1.4 million to 3.5 million individuals per day. This article was authored by Bondi Arifin and Titic Anas.