There is a lot of great tutorials GWE ,when the first screen comes up look at the top for tutorials and at the bottom is has a link to all the tutorials , it will give you a good understanding , I start topping when she gets 6 nodes and I dont stop until a couple of weeks before they go into bloom ,all of my plants are 4x4x5 right now with a ton of bud sites ,good luck and welcome to the forum