http://socionic.info/esocpubl.html
this page has many articles already person-translated into English. Of particular interest is the first link on that page, the "Basic categories of Socionics" which is apparently a translation of an actual booklet designed to teach the basics of Socionics to the average person. I personally like the psychoanalysis of the relationship, showing how the relationship's nature is derived from the Socionic model, not just arbitrary subjective descriptions, and how the analysis from the model fits with the actual arbitrary subjective descriptions.