Hey timeonthewater, sorry to hear you had issues getting started. I would however like to invite you to try v3 of this plugin which was released as Popup Maker here on www.ads-software.com. It adds a lot of new features including auto open and custom selectors for click open.
I understand what your saying and will look into adding those types of things to future versions of the plugin. There is a dropdown in the editor now though that has a list of all popups in it. You can highlight text in the editor and select a modal from that list which will cause the highlighted text/images etc to open the modal when clicked.
Unfortunately we can really only make it so easy, we have attempted to remove code from as much as possible but often the targeting that needs to be done even with custom selectors ( user defined css selectors ), some assistance is often required to determine what selector they need to use. Click open is unfortunately a quite complicated task when you consider the potential places it may be used. IE content, widgets, menus, templates, filters.
Our goal was simply to make it as simple as possible while still remaining completely customization.
Hope this helps & I hope you will consider re rating the plugin once you have tried the latest version. Popup maker has tools to import your modals and tons of new features, too many to describe here. Popup Maker contains a lot of the missing pieces and there is a free/simple migration path available.