Rear View Window process

I hope this is comprehensive enough for those that want to see how I work on things.
I started the image narrower initially but in the end decided to add an inch to not have the knee of the girl hit the edge and have a little more room around the window on the other side of the street.
Everything done with Photoshop, default brushes (hard round second series in the brush window. First series is called hard round as well but doesn't have the transparent ends). No reference was used. Original size 3307 x 4169 pixels (about A3/300dpi)