Hello,
1. It doesn’t relate to our theme functionality.
2. You may create row with 3 columns and add in 1 and 3 columns 2 elements OR
use create grid using Essential grid plugin and add it on page https://www.themepunch.com/essgrid-doc/essential-grid-documentation/
for example, http://prntscr.com/h7byrt (http://prntscr.com/h7byz1 http://prntscr.com/h7bzcs http://prntscr.com/h7bzkr) also here you may create custom item skin http://prntscr.com/h7c0er https://www.themepunch.com/essgrid-doc/item-skin-editor/
3. Here you may find our main recommendations https://www.8theme.com/reply/175787/
Also, according to testing your site on https://gtmetrix.com/ your images aren’t optimised http://prntscr.com/h7c2so
Regards