Hey bud, thanks for the tag!
These guys have got you on your questions
But for your peace of mind, I wouldn’t worry about the size of her yet, she will grow a lot more during flower.
I wouldn’t normally post pics of my own on other’s threads but I wanted to show you, this is how mine looked at first sight of flowering, then compared to yesterday…
Oh and she has been on 18/6 light schedule for the entire time.
So yeah, she gonna stretch, no doubt.
Good luck and I’m set to watch!