I'm trying to create UVs for a 3D model (castle keep), being completely new to UVs I don't know what the "final destination" should look like, so I cannot reach it. I followed a few tutorials but I do not know what the UV window should look like to be considered "Done". The issue is not how to do it, but what to aim for. Is it maximizing the use of the 0 to 1 space? do scale of parts matter in relation to one another? Do I need to keep the model together as much as I can, or should I get it more separated?

I have here images of the castle keep, and what the current result, is this what you would aim for?