There are several service levels offered by international moving companies. The right option for you will be based on budget and whether you have secured accommodation in your new home:
Full service: includes a packing service as well as shipping belongings from your existing home to your new home abroad. Although this is the most expensive option, it may save you so much time that the extra cost is well worth it.
Door to door: the moving service collect your packed belongings from your home and move them to your new address.
Port to port: you must drop your packed possessions to the port and they must then be collected from the port at your destination. This may work well if you have not found accommodation yet and you have a mode of transport to get your belongings from the port to your home.