Thank you tidal for your comments.
First I want to say you that I am proud because you say
"I think you are a great painter"
I know i have already made some progress but I have still to work. I think your words mean I have already get some skills and I am happy because I doubt myself.
I read several times your comments and I do not understand (my english is not perfect too!!!)when you say:"read up on "superposition and subdivision" etc. it would be a little lengthy to go into on here is why I suggest you look into it online or by book etc.
You give me the advice of looking in a book, but what book?
I have read another time the first answer by Joy. It seems to me now he is right...
I am thinking about every idea, and when I would be sure of me, I will put my canvas on the easel another time...