Just google human proportions, this for example. http://www.drawinghowtodraw.com/stepbystepdrawinglessons/wp-content/uploads/2016/04/ideal-proportions-various-ages.jpg
Looking good, the rain is starting to give it that gritty feel. Definitely could push the neon though: http://underthehollywoodsign.files.wordpress.com/2010/04/blade_runner1.jpg