A little background, I am quite new to Drupal and IT in general, so this may be a silly/basic question (I am going to start learning HTML, CSS, PHP, etc. for Drupal). I first set up my Drupal site by following the steps on drupalize.me, and then I installed the Sublime Text Editor 3. I realized I had already installed some contributed modules and the Bootstrap theme from drupal.org, but I didn't have contrib and custom folders for modules and themes, both. So I created them and moved the contributed module folders to the contrib folder under 'modules'. I also moved the contributed Bootstrap theme folder to the newly created contrib folder under themes. Then I tried to load my website but it said 'The website has encountered an unexpected error'.
What went wrong here and how can I move my already installed modules and themes correctly to their respective contrib folders?