Looking good so far. :thumbsup: Shouldn't take long to figure-out which is the autoflower strain. They'll let you know.
Patience is really, really necessary, regardless of the grow techniques used. (soil, hydro...) Seedlings tend to take their merry, sweet-assed time getting started, but that's just the way it is. :jointsmile: Did you bury the seedlings up to the cotelydons? You keeping a gentle breeze on 'em?

I would raise the ph to around 6.5 to 6.7, and avoid overwatering. When I add nutes and suppliments to water, it lowers the ph even further. I keep mine at 6.8 or so. (before nutes) On CalMag and molasses day, this brings it down to 6.3 or so, which is as far south as I like to let the ph go. (molasses water added to flowering plants only, not seedlings or veggies)

But looks to me like you're on the right track. :stoned: