Creating my first permaculture design (NEED IDEAS)

Hi!

I just bought my first piece of land and i’m trying to design a permaculture garden on 1 acre of the property. It is not flat and has a depression running in the middle of the property which can be seen in the images (red curves display approximately the angles). There are a lot of wild blackberries growing like weeds so it think the soil type would fit in a clay category (if i’m not mistaken, I haven’t tested the soil yet). I basically divided this 1 acre into 4×8 squares (around 10x10m). Would like to hear suggestions on how to improve the design, if something needs to be rearranged more efficiently I’m very new to this.

Thanks