First, move to a safe spot and check everyone for injuries. Call 911...

https://www.expertlawfirm.com/what-to-do-after-a-car-accident-in-texas-a-step-by-step-legal-and-practical-guide/

First, move to a safe spot and check everyone for injuries. Call 911 immediately to get an official police report. Take clear photos of the damage and collect contact information from any witnesses