Task priority based on Oportunity Amount

How to create a task when the opportunity status is changed from a specific value from picklist to another specific value too, then update the task priority based on the opportunity amount in flow/proceed builder?

Im tring using rules, but quickly notice that it cant be opportunity and task in the same rules. Do I need to add new costum fields or costum object?

Thank you in advance for your time and support. Your assistance will be highly valuable in my learning journey.