According to the PMBOK Guide, 7th edition, one of the best practices for introducing agile approaches in an organization is to start with a pilot project that has a clear scope, a committed sponsor, and a willing team.
This way, the project manager can demonstrate the benefits of agile, gain feedback, and learn from the experience. The project manager should also provide agile training to the team members and stakeholders who are involved in the pilot project, to ensure they understand the agile principles, values, and practices. References: PMBOK Guide, 7th edition, page 23; Agile Practices and the PMP Certification