Is there is a download version CiviCRM that is close to the Spark version. I would like to download it first locally and get comfortable with it then try Spark.
Also I think that the Admin functionality is available for tweaking some stuff but I also think there is a limited number of extensions available at this point. For instance can I add new or rename variables and menu items?
How about creating web page forms for embedding in a website such as a WordPress or Drupal CMS? I know it uses Drupal but still learning about running CiviCRM stand alone and then integrating with a CMS. I personally believe Drupal integration would best long term but might need to integrate with an Existing WordPress site for now. That is if the Spark version even allows integration with a CMS.