https://www.epo.org/en/service-support/faq/learning/european-patent-administration-certification/enrol-do-i-need-proof-i

To enrol, do I need proof that I have been on a course?

You can enrol for the EPAC exam without following any courses, and you don't have to enrol for the exam to follow the EPO's EPAC course.

How you prepare for the EPAC exam is up to you.

The EPO's Academy provides training materials, and also external providers offer EPAC courses.