I’ll give it a shot. What is driving your actual desire to enter the industry? A master’s degree is not an insignificant investment in both time or money. Is your interest in the industry derived from a need for better income, or just a pure desire to spend time on the water?
Read what you received from TMA again. Is a master’s degree possible at this age? Sure. But there was one sentence about the license, and the rest was about the course of study that leads you to a land-side job working business/cyber for a maritime company. It may be easier to land that land-side job with some operational experience at sea, but completely not required. Honestly, TMA probably highlighted this aspect of their program because if you are looking for a real return on investment, the higher pay would be behind a desk in the office than as a mate at sea. But is that what you are looking for?