There are many good discipleship curriculums but nothing take the place of a personal coach.  I have found that discipleship works best in small groups.  A group of 12 or less is ideal for discipleship.  I have not seen very many "discipleship classes" produce long term effects.  However, small group settings are life altering.  When choosing a curriculum for your small group, I suggest simple, easy to read books that have discussion questions at the end of each chapter.  This is not a sales pitch, but my latest book, Get Up, Get Out and Get Blessed, is designed for a small group setting.  Each chapter is short and ends with discussion questions.  It deals with getting over sin and building a relationship with Jesus. Don't feel that discipleship has to be an overview of doctrine.  That's usually over a new converts head.  Let them grow into that.  Start simple.  The book of Mark is a good start too.