Download statistical info NDVI

Hi, I cannot figure how to download Statistical data from NDVI map from a dedicate field uploaded in KMZ.
Statistical data from 6 months.

You need to use Statistical API:

There you do not upload the KMZ but rather pass the field boundary as a GEOMETRY parameter.

I don’t understand how to applicate this into my computer.
I’m french and i’m not good in coding.
I have this page and i want to extract the chart with the data.