First of all, at least. English must be good. At least there should be no obstacles to written communication. Spoken English is of course a must. Learning a language is an accumulation process, because there are different cultures behind the language. If you don't know other people's culture and just stay on grammar new words, then you must be full of Chinglish. So be careful everywhere. You can blurt it out when you accumulate it to a certain extent. This organization can't help you.

Then there is the basic knowledge of international trade. These are all self-taught. Look up everything on the internet.

Trade idioms, at least know the commonly used EXW FOB CFR CIF.

Payment method is a common way in international transactions. Documents commonly used in international trade. International business letters, etc.

Learned these things. You can already do some preliminary sales work.

Of course, doing an excellent foreign trade business requires a lot of knowledge. For example, international transportation, customs declaration and inspection, relevant national laws, international exhibition process, international business negotiation skills, communication skills with foreigners, etc. These have to be accumulated slowly on their own. There is no training institution to teach you.