2D or 3D Animation for making Animated Movies? Adobe Flash or Blender?


I am going to be making a movie for my story I have been working on in a couple months. I have been on the debate of going 2D or 3D for the animation. I kinda want to do 3D since I would like to make the movie a little realistic. And I have been looking at tutorials for both Adobe Flash and Blender and they both look like pretty good programs to use.

ALSO, this is my first time making animations and such! So I have very little knowledge about animation.I checked out [color=black]2D character animation video for some help but couldnt find any.
Any help is greatly appreciated!!

Thank you.