  This paper is the first of a series of introductory papers on the fascinating
world of Soergel bimodules. It is combinatorial in nature and should be
accessible to a broad audience. The objective of this paper is to help the
reader feel comfortable calculating with Soergel bimodules and to explain some
of the important open problems in the field. The motivations, history and
relations to other fields will be developed in subsequent papers of this
series.
