They are different. URL stands for Uniform Resource Locator and refers to the entire address of a web site, including protocol http or https then :// then might go www and site name and extension at the end.
You need to purchase SSL certificate, Every SSL that is purchased with BWA account would get free installation and integration service for any BWA hosting. If you bought third party SSL, please follow an instruction from original seller.
Every new web hosting comes with cPanel (self managed WHM) access with two clicks installation option for WordPress. Contact web admin and we install WordPress or Drupal to any of your domains hosted with BWA for free.