To become a successful importer it is not necessary that you should know everything about importing. It is possible to become successful even if you use the services of some customs brokers. However it would help you more if you know the intricacies of importing. For small quantities you can use the courier services that take care of the customs clearances. Before you import any product for sale in your country, first ask yourself whether that product is necessary to be imported. To become a successful importer all by yourself, you should know the regulations, the customs duties, tariff rates, and the other complications involved in importing.
There are many courses available even on the internet to learn how to import. There are also books available online which might help you to achieve what you want. With these materials, you can learn about the licenses, how to find the suppliers, ways to evaluate the product, freight methods, and how to escape the red tape. These would help you to become a successful importer.