Is she too tall?

It is an autoflower, RQS Easy Bud Auto.. I hope she'll be ok on 16/8 cuz it is very inconvinient to extend light hours, neighboors etc. Fan is for now above them, oscilating around the tent and a bit on plants, 4 of them in atm.. Thanks to all on answers, much appreciated!!

You could add more soil to the top of the pot and cover the stem leaving at least 2.5cm/1inch of it, for LST as mentioned before wait until the plant has at least 3-4 nodes before applying any stress on it. Top and then main-line is a good way to go! I'd put the light schedule at constant 18/6 for veg, if its an auto then 18/6 throughout the whole grow. Hope this helps! Good luck and happy growing :)

Do you have a fan on it? To help strengthen the stalks?

I'm guessing that it is an autoflower. I believe you can start LSTing when you have 3-4 nodes, that way you won't harm it while it's a developing seedling. Also that other commenter has a good point, you should add a lil dirt around the stem to give it a more sturdy foundation, if your plant seems flimsy.

I'd just put more soil in your pot and bury that stem a bit more. It's stretched more than I would want but that's what I'd do. Wait to do lst till you see a 5 tip leaf imo. 🤘😤