I never bothered to learn HJKL navigation since I nearly simultaneously started using Dvorak, Vim and DreymaR's incredible Extend layer. The Extend layer is a software XKB mapping where holding Caps Lock lets me use arrow keys, Home/End, Backspace/Delete, PgUp/PgDown etc. Directly from my home row position. It is responsible for tripling my editing efficiency as it lets me make instant corrections and jumps anywhere.