Looking for school advocacy certification recommendations

Has anybody here completed a certification or formal training program to increase their knowledge of school advocacy and special education?
I’m interested in completing a more structured, in-depth course to strengthen my understanding of IEP/ARD meetings, special education law, school-based services, and the transition from ABA services into a school-based learning environment. My goal is to better support clients and caregivers as they navigate this process.
We do have clinical directors and other BCBAs with experience working within the school system who are great resources; however, I would also like to complete a traditional/formal learning program to further develop my own skills and knowledge.
If anyone has completed a special education advocacy certificate, training program, or similar coursework, I’d love to hear which programs you completed and whether you would recommend them.