Is it reliable to recruit ordinary workers on board in the same city?

Not reliable, there are many liars. They will let you apply for a crew certificate. First, they will pay money to study in their designated training school, and then they will send you to the ship for an internship for six months, because you must have one month's internship experience to get the certificate! I have lived in vain for half a year, and even if I get a certificate, my salary will not be very high, because after all, I am a novice and have to live an inhuman life.