I'm not sure when to start LST. Reading the tutorials it says when the plant is young / still a seedling, but this is the 1st time and don't want to start to early or late. This plant is bag seed.
are you going to top it or just low stress?
She is getting old enough, if you start just be gentle and weight down your new growth as it starts getting long enough. You can also give it a week or so without any danger of it being to old.
read the tutorial mentioned above a time or two.
nice plant.