My window faces south. I do not have a room with good northern light (at least not one that I take over for a studio). It took me a long time to try using natural southern light. For some reason I spent a really long time trying to find an artifical light setup that worked. Glad I finally gave up.
I share shelving with my kids. As you can see, they spend a lot of time organizing their books wen the put them up. If you look close you may recognize some items from my paintings.