Of course, on-site practice is the most important for safety. Technically, the most important thing in construction is experience, so you need an experienced master to take you. If you don't understand, you must first be familiar with the drawings. Then, because you are a student and have no specific contact with construction, you should read more pipe fittings, valves and the like provided by manufacturers, and have a rational understanding first, so that you will be more impressed when you go to the construction site to see the real thing. And what types of pipes are available for water supply and drainage. These are all preliminary. The rest is some pre-burying, pipeline installation, and you just need to find a master to take you to the construction site.