I need advice for my building exterior. We have tall 5 storey buildings on all 3 sides of our building i.e on the back side & on both left and right sides of my building, hence there is no privacy.

I would like to do this kind of vertical garden on all 3 sides, but I am afraid it will make my building interior look very dark with absolutely no seepage of sunlight. I need this privacy wall from my neighbors as the view is very ugly, and also I should mention that the buildings are only 6ft apart.

Also the creepers may shed leaves on other's property. How do I go about doing this, that meets both privacy and sunlight. Is it feasible in my scenario? Please advice.