Hi, welcome to the party! Compiling UE4 takes a looong time on most machines. I usually run the editor from Visual Studio, by setting the UE4 to be the ‘startup project’, using ‘Development Editor’ as the configuration choice in the dropdown list at the center of the menu/tool bar. There are plenty of resources in the UE4 docs regarding the details of how to run UE4 from Visual Studio.
Regarding “I hope it includes VXGI, which is my most desired chocolate from the box.”, if you downloaded by cloning the tree using Git, you will have to ‘checkout’ the VXGI branch. If you download by grabbing the zip file, you get it by selecting ‘VXGI’ in the little window that says ‘branch:release’ in the upper-left corner of the table on the Github page, then click the ‘Download Zip’ button found in the lower-right corner.