Let your career goals and personal interests drive your professional development.
Formal Project Manager Certification and training should only be 10% of your development efforts.
The remaining 90% would occur through relationship (e.g. mentoring) and experiential (e.g. hands-on work) learning.
If you have a particular interest in a specific topic (e.g. program management, agile, risk management) then, do some formal training to learn the basics, but then get out there and apply what you've learned.
All the best!
Hope this helps!
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