From what I read and understood, you cant jump from a 4.3 bootloader to a 4.4+ OS.
Also read and understood that upgrading from 4.3 to Lollipop to Marshmallow was recommended over jumping from 4.3 straight to 6.x.
Also, no place i searched for has all the resources needed for this specific upgrade path in a single post.
Oh! And because I'm very analytic and slightly paranoid about losing my data.
I'm on 4.4.2, so I shouldn't have to go this route then?