Legal Question in Civil Rights Law in California

A written statement in your autobiography can be the basis for a cause of action for defamation. There are only limited First Amendment protections for statements that are defamatory, and the First Amendment is not a complete defense against defamation.

You would need to argue any First Amendment issues -- many of which have been already incorporated into the law of defamation -- during your defense of any defamation action. There is nothing else you can do to "protect" those rights before that time.