If you want to help dad, you still need management and general skills, which are difficult to learn practical things at school. If you don't want to waste too much time, I suggest you go directly to your father's construction site for internship, so what you learn is fast and practical. If you encounter problems at the construction site, you can consult and learn from the site builder (Party A will have technicians on site) or the supervisor, which is more efficient than learning from teachers at school. If you really want to study hard, it is always faster to find some books while learning than to study at school.