Let's say for example that the CSV contains one line: "AAA;BBB;CCC" how to get this value from within the CSV ?? what format should I use ??
That's not a CSV (comma separated value) file, that's a SSV (semicolon separated value) file, a format that nobody uses. And there's no timestamp in the first column, which is required.
So your first error is that your source material is no good. Fix that.
Here's an example of a good CSV file, with a header line included (also supported by Zorro):
Once you fix your source material, write the format string to match the format of your file. The manual spells this out very clearly, and there are examples in the example script.