Can you learn to be a foreman in 20 days?

Generally speaking, you can't learn to manage your work at this time.

Plumbers refer to those who operate special mechanical equipment, process metal and nonmetal pipelines, install, debug, maintain and repair pipelines. Under normal circumstances, an apprentice plumber needs to study for three years, and it takes a certain period of practice and training to master the necessary skills and knowledge. This process takes several months to several years, depending on the individual's learning progress and goals.