Custody

Got divorced a few years ago, and parenting plan was created, with me being primary parent and I have educational decisions. My lawyer did this so I could move out of this small town and get my child into a better school as long as I did not move over 55 miles. My significant other bought a house last year and we are finally making the move in November. Fast forward to yesterday, told my child’s father I was putting child in sports and next year it would be in the town I’m moving to. He and his family were using a fear mongering tactic and telling said child that he wouldn’t get to see them much anymore and would be beat up by black children if he goes to this school. Was also told this was a time to keep his mouth shut. He is 9.. I’m now looking into getting a lawyer, my sister and partner are telling me I have a good chance with the courts and may even have the plan parenting plan revised. I just want advice from other parties that do not know me..