Now it is not expected for you as an Instructional Designer (ID) to enroll in an 'official' PMP® certification training before you're able to master project management methodologies and tools, not at all! As a matter of fact, what is recommended is for an ID to have a workable proficiency of project management processes that will strengthen activities and outcomes related to managing time, cost, risks, deliverable, and communication with the SME, among others. Check out this article to get a concise overview of how these two 'schools of thoughts' bridge together to accomplish this!