The treatment of container gantry crane drivers is generally guaranteed salary+piece rate+bonus, etc. The level of treatment is relatively high, but it is hard.
To learn the operation technology of container gantry crane, you can attend relevant training courses. Generally, you will work in the port first, the company will train you, and then you will get the certificate. In principle, you can't operate the gantry crane for myopia, and you can also operate to correct your vision to meet the requirements, depending on the port recruitment requirements.
If you work hard and feel reliable technically, I suggest that you can engage in port machinery maintenance.