When should I start separating here are some pics of my progress
updated by @jimdog91: 05/17/19 02:13:03PM
You could start now as you definitely have some sections forming the only thing is you can easily pull those sections apart by separating them so just be careful and take your time. Just feel each section and see if it feels like there are multiple sections stuck together, if not then leave it alone and move on.
You'll probably find that they aren't too bad at all as the hair hasn't started to actually dread yet.