Traveling Through Chongzhen, the Ming Dynasty Cannot Be Saved, Overthrow It and Reopen It

The sky is falling. I just traveled through time and became Chongzhen, and am I poisoned? That unruly man wants to poison me. Others have space, systems, and golden fingers when they travel through time. He has nothing. How can an ordinary person survive in the late Ming Dynasty? How can we save Daming?