How far along?

Hard to tell without looking at the trichomes but looking at the bud itself it looks ready the way the pistils are retracting into the bud is a common sign that she is ready for harvest. Though I always look at the trichomes myself and then I let the nose come into play "most strains" give off a pungent smell that we all know and love. Not sure on the pheno but with alot of hype over autoflowers these days it would not surprise me if this is one. in order to shorten times breeders have tended to breed smaller plants for them to finish quicker. though this is not fact its just my opinion in whats happening if its a photo period I would suggest vegging a little bit longer and getting a nice plant structure with alot of branches and tops. best of luck anyway buddy keep in mind buds tend to fatten up the most during the last few weeks of flower it might be worth keeping her going abit longer to see if you get bigger or denser nugs :) Nice looking plant anyway very healthy :) best pf luck buddy :)