[WP Smush Pro] Optomize Foto for Speed Performance

Hi,
I subscribed to your Community because I need a tool to Optimize images and Compress in order to Improve my Speed Test Performance via https://gtmetrix.com - Your products didn't help! I have been trying to run test and Optimize the website performance since 10 hours ago... I got a list of images to Optimize and Resize ...
Plus, the first time I installed your plugins and ADDED my website to the HUB, it also gave me choice to ADD Theme, when I added Theme and Child Theme, my LIVE website reset the Custom CSS and I had to fix it.
My server host is SiteGround - let me know how to optimize my images maybe there is something I missed. Thankx