Second, it must be false to charge you money without letting you board the ship.
Third, all crew members must be trained, even if you are a chef. Regular company training is free (because you are a chef, you don't accept other sailors or anything. You must have a tax sailor's certificate to board the ship, just like a college diploma.
Fourth, there must be insurance. Some intermediary companies can get you the starting salary according to the relationship, but they are not employees. Without insurance, if something happens, you will be finished (it belongs to illegal households, and the state doesn't know you are in the car at all).
Fifth, we must endure loneliness. Every day the scenery of the masters is exactly the same. People with psychological problems can't go to sea.
A friend went out to sea for a few months to see if he could adapt, and then he quit after going out for a few months. The higher the rank on the ship, the better the treatment. Some information needs to be identified by yourself and carefully considered to prevent being cheated.