ENGLISH: My advice to people who want to get into street photography is to read Thomas Leuthard's ebooks. They can be obtained from his web page (link below). Start with Going Candid and then read Collecting Souls. It is a good starting point.
I also recommend that you take a look a Mr Leuthard's photos. He is an excellent photographer.
Thomas Leuthard web page (ebooks section): http://thomas.leuthard.photography/ebooks/