[Seriy]

Pablo, what to learn? yes to everything, starting with the history of painting, what every artist is interesting that he has brought new? If you think that it is somewhere written in the books, you're wrong, then that is written for everyone - practical training value of the artist does not have.
The composition is a very complicated issue. Yes, Kandinsky, the genius of composition, wrote a book. I have read. Do you think it helped me to create powerful sounding songs out of nothing, as Kandinsky knew how?
Color pictures of the construction is a very complex issue. Starting with the fact that the paint is a convention, if you attach the brightest pink dye to the flower petunia, you will see that, compared with the nature, the paint is not pink, and almost gray. The palette of the artist and opportunities to work with the color very conditional. Simply put, you can not copy nature, no tools. It should be again, having what is on the palette, create wealth color, sound, that turned rosy pink. It takes so much time and effort that all the painters come to a rather limited palette, the one that they have successfully mastered, and do not change it to the end of life. A mixings? that, from a tube to write? but, again, you can not mix everything will be dirt, there is a stable set of mixtures of colors that work ... and so on and so forth. To study and learn.

 And, the first call at the last one - you're talking about a romantic profession of the artist, but probably most of the artists in their work are not engaged in self-expression, and work in the specialty-painted church, restored, working on the interiors, teach, work for artists porcelain factories-many application fields where the need proven skills and techniques and do not need any self-expression and individuality.