some of the shapes you see in the home page were done using custom code and to change their colors please follow the steps in the picture https://prnt.sc/n078dg
you need to edit the portfolio items with elementor to do that please follow the steps in the picture
Yes you can hide the preloader to do that please open the theme customizer and navigate to “Gentium Theme Settings > Preloader” and there you will find the option to hide the preloader
To import the demo data to import the demo data please follow the steps in the picture https://prnt.sc/n48pi9
To learn more about Elementor please follow the link bellow
You need o delete the images of the about section see picture to learn more
1) To use the fonts in the page builder please install and activate this plugin into your site and follow the info in the pictures
2) to use the fonts in the blog single blog and mobile menu which are controlled via the theme customizer please follow this steps
yes you can change it but you will need to do some code changes
https://prnt.sc/pxcs21
https://prnt.sc/pxcst2
1) To remove the vertical lines above the section follow the steps in the pictures https://prnt.sc/nmujn1
2) and to remove the vertical pink box follow the steps in the pictures https://prnt.sc/nd8b7y
Best Regards