First and foremost, you should move to a safe location immediately to prevent any further injury or property damage.
Once you have properly evaluated your injuries and called emergency services (as needed), you should obtain insurance information from the other driver, including the details of their vehicle. Lastly, if possible, take photos of the accident, including both vehicles, and all injuries you suffered.
What to do after a motorcycle accident
Do I need to talk to the other driver's insurance company?
If you have follow-up questions. Send 'em our way.