We're not reinventing the wheel on protest guides. Here are a few great resources on protesting:
Amnesty International - How to Protest Safely
University of Washington - Protesting Safely During COVID
Surveillance Self Defense - How to Protect Your Identity at a Protest
Engadget - How to Protect Your Identity at a Protest
NYU School of Law - How to Protect Yourself at a Protest (How to talk to the cops)