I want to be an apprentice in a musical instrument factory. What did you do at first?

I only know about my apprenticeship in erhu factory, and the rest should be similar. In Erhu Factory, I began to learn from the basics, such as filing, hammer, axe, plane and other basic tools, learned to adjust the piano shaft, rod and barrel, and painted the piano. Generally, the technology is high, and you won't be allowed to do it for a few months. After getting familiar with it, you will gradually be asked to do technical work. Generally, I will start my career in almost two years.