The installation process is same as that of any other WordPress plugin.
There is no configuration option as of now. The plugin auto detects everything required and generates the sitemap. This is to not confuse users with unnecessary options.
The configuration page is under Settings –> Udinra Image Sitemap Pro of your WordPress dashboard.
You just have to activate the plugin with License key.In case of any issues with respect to activation you can contact me.
The moment you activate the plugin your image sitemap file is created.The main sitemap file is index sitemap file (your-domain.com/sitemap-index-image.xml). You should add this sitemap to Google Search Console or any other Webmaster sites like Bing Webmasters.
Submitting sitemap to Google is one time activity. The sitemap gets created automatically and is pinged to Google. So there is no action from your side after activation of the plugin.