Look up (Low Stress Training) Which consist of using tie methods, very hands on.
OR you can TOP the plant..
2 methods of Topping or (High Stress Training) are FIM and Straight Forward Topping...
*Topping the plant is done at the 3-4 node once the plant has grown about 6-7 nodes...It tells the plant to stop growing up, And start producing bud lower on the main stem, Along with 2 new Main Colas!
*FIM- Is a bit tricky, The cut is made above the normal topping method. Instead of completely removing the apical tip, you are only removing half of it, looking like you "missed" the top. This can result in 3, 4 or even more tops from the location
Good Luck!