Just a little. Id tie the very bottom where it is, then loop above 3rd internode and offset the top in the opposite direction an inch or two (3-5 cm). This holds the top and allows the side branches to begin catching up in height. Try not to damage or shade 4th internode with the wire.
Yesssss bro. Look at my watermelon zkittlez grow. I started about a week before this and they grew like monsters. 4oz off each. Try topping next time. Most autos can take it
Hi mate, I would wait till she is a little taller before attempting any training. Autos do not like stress so LST will impact harvest yield. I would top her main stem the let her grow. I hope this helps, good luck and happy growing