Acrylic on Canvas: Chambly Canal in January

I went to Chambly Canal National Historic Site, Quebec last weekend. The canal was amazingly beautiful but the weather was so harsh that I cannot stay for so long.
I painted this small acrylic painting (8X11) this afternoon based on the photo I took last weekend. Because our sketching club only provided blue, yellow, red and white, I needed to figure out how to mix them and create the colors I wanted. It seemed that I was not good at tuning colors... I spent one hour on this small painting and then I gave up. I felt a little bit disappointed about my new work...