Writing and or Blogging About Particular Entertainment Topics

I am not sure if this is in the correct section but I know that there are some people here that write pretty good reviews on films (retrospectively) and other things just based on what I have seen on here (likely even better than me in my opinion).  That being said, I have to ask…for those that have explored certain aspects of “being behind the camera” and the like, how exactly does one do the necessary research not just on finding material pertaining to the topic of interest, but also what thorough historical materials should one look into and how to verify said information prior to making the post about it?  (I apologize if it sounds wordy or lengthy).  The reason why I am asking is that I have been slowly trying to do a “research hobby project” for the past several months and it is an extremely agonizing slow start since I started reading about a certain book that I purchased recently about Tokusatsu (Japanese for special effects).  I would like to point out that this has decades of history and information and some may consider me crazy for trying to attempt such a feat (I know that I would consider myself a tad bit crazy).  Also, I get that certain people have certain ways of getting memorabilia on certain shows/films, and to me…they’re like historical artifacts (think of it as media archaeology if you will).  Those that know a thing or two about what I am getting at, I would seriously appreciate your feedback.  Much gratitude.