It seems that you have acquired some valuable experience already. If you are seeking to enhance your expertise and self-assurance, you may want to contemplate obtaining a professional certification. Although a master’s degree can equip you with essential skills and credentials, it may not be advantageous or necessary for your particular career aspirations. In many cases, practical skills and experience are more highly prized by employers than formal education. Therefore, it is crucial for you to assess whether pursuing a master’s degree is worth the investment of time and resources. Furthermore, it is vital to continue learning and advancing as a designer by attending conferences, joining design groups, and soliciting feedback on your work.