AutoPlay on Lightbox slideshow - Wexley template

Site URL: http://mdavisphoto.com

I use the Wexley template.  The main purpose of the website is to show images.  It's a hobby site, not one for selling (at the present).  When the url of my site is entered it opens up to the "Bird" page. which is one of several different photo topic pages.  If the viewer clicks on an image it opens in what I think is called a lightbox (although it doesn't seem to dim the surrounding space).  I'd like this image to then autoplay and scroll to the next image and the next (and stop on mouse click, and resume on mouse click).  I contacted Squarespace support and they said that this template will not do that.  Is there a workaround that has been found or should I change my plan from personal to business and add custom code?