By the way, do you think the communication will be difficult for me since I have learned everything in English?
Although Greece is not the best in the world to demostrate the fact that English is THE prime language in aviation, and although perfectly legal, sometimes the frequency gets clogged with Greek, you will absolutely not have any problems communicating in English with Athina Information (FIS), assuming you will be flying VFR. Sometimes if you're lucky, nearby traffic may even talk back to you in English, for situational awareness purposes.
TR
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