LST now?

I would transplant into a much larger pot soon as possible, then wait until she has 6-8 nodes before starting with any training. At this age/size she needs all the energy she has, to go into becoming established, not going into trying to cope with LST. The lowest leaf breaking the tip off is nothing to worry about, it usually occurs because the leaf contacts the ground then rots away after a while. Hope this helps, Organoman.

You can! But I usually wait maybe a week from where your at to start LST. Check out my purple punch auto In my diaries. I have a video demonstration ☺️