@BOB91:
i asked here to fine the right way to learn
anyway many thanks to you
The Arduino.cc forum is a premier learning spot, but only a small percent of users give-back by working the forums and being a subject-matter-expert. It is difficult work. As such, the forum etiquite is to research your question first, educate yourself, read the forum rules on posting, and then articulate precisely. All of this helps us to help you and then quickly move on to another needed person. Social interaction and nice are for the Bar Sport part if the forum.
Welcome and take light critism as positive input.
Ray