Many people who have a child custody agreement with their ex likely don't look forward having to discuss potentially contentious matters with that person. Unfortunately, you face the possibility of having to do this as your child gets older and their needs change. It can be difficult to think about making these modifications but the children can suffer if you try to continue to shoehorn them into the terms of an agreement that was made when they were much younger.
One thing to remember when you need to make modifications to the child custody agreement is that it is always better if you address the issues sooner rather than later. The last thing that you need is to have to try to rush through a decision. Making rush decisions can mean that you don't have time to fully consider the options. This could lead to your making a decision that is suitable but that wasn't the best for your child.
Another thing to remember is that conversations might become more difficult when the decision is major and there is a disagreement. Instead of worrying about getting your way in the parenting plan, you need to focus on having a respectful and productive conversation with your ex. You might need to use a mediator if things are too tense and there isn't a way that you can communicate directly with your ex.
Finally, always put the child's needs first. Sometimes, the best solution for the children is the more difficult option for the parents. Be willing to accept that. It might help if you can try to think positively about the situation.