Using a photo is not too challenging as the subject does not move. That being said, I often use photo references in creating art but I also rely on my sketches and experience as well. Photos can help with details.
I sketch in the field from time to time but I really want to become more disciplined about doing it. I often have a hard time focusing in the fiel-so many distractions. I hope this corse will make me more confident, make me take the time for what I consider an important activity, and help me to build a library of ideas that I can refer to for composing finished works.