How long does it take for apprentices to learn as tea artists?

If it's a tea artist's certificate, it won't take long. One month is enough.

If you really want to learn tea, it depends on how much your teacher taught you and how much you taught yourself. The sea of tea is boundless. You'll never finish learning it anyway. It is enough to master the basic knowledge seriously and diligently for one month, but it takes time to understand it deeply.