What would you do ?

I’m a proud new owner of a 3000m2 (0,741 acre) in the middle of France, near Tours. And I post this by curiosity to know what yall would start with, I have a plan but I may completely change it in the future since I know very little thing on the subject. This was an old conventional cereal field with tractors etc, it was not used in at least 5 years so plants grow and die naturally since. Soil il pretty clay ish. Also the west neighbor field il a still used conventionnal cereal field with glyphosate sprayings so I was guessing plantng a vegetal hedge this side 😁