I think there is a lot of things to do, to make your building nicer, and more welcoming. Also without spending a lot of money. Here are some of my ideas.
As I am an architect from Denmark, my english is not perfect. So please write me if there is something that is not clear.
Thank you, and good luck with your facelift.
I think that the overhang should be torn down and rebuild in a lighter timber construction. The existing one is simple to massive, and is giving the whole building this heavy and introvert feeling to it.
In generel the building would look a lot more inviting, if it had some lighter colors.
Painted bricks still looks very stable, but have a much lighter feeling to it.
If your curtains are shut most of the time anyway, then maybe you should consider getting some venetian blinds. These can be mounted close to the window, which would make the windows brighter, seen from outside.
The first things that could be done, was to paint the fascias and panels around the building in a brighter white. Then get some more plants and colorfull flowers.
In this illustration the walls have been painted white. I dont know if this would be possible, but I think it would give the building a much lighter feeling to it.