New blog -> first problems

So there is this new blog, but many questions arise:

• which language should I choose ? english to reach more people, or deutsch, weil ich es besser kann?
  
• what to write about? I would like to write about movies, books and coding..
• which of these layouts is fitting my extraordinary taste?
• schreibt man in der tagliste hinter jedes komma ein space?

So I will start before answering the basic questions, as always.  A good software developer always develops before he knows his goal.