Well, it's too early for starters if you top now, you'll only end up having to keep topping and, if u are having trouble now then wait till it grows at least 5 nodes and top above the 4th or u could even do the above the 5th and that have to keep topping that's what I did with my zkittlez hydro and it's taken off. 9cm last wk in 7d sane again this wk in 4 days. Anyways best of luck. Just make sure when you are topping that you don't take the tiny little shoots that are above the fan leafs that's your next node. Leave a little bit extra on the stem, so jst cut right under 5th nodes fan leafs.but if u wait to top u won't have any probs telling what's what even for a beginner. Happy growing. Good luck