As the title states this is my very first time growing a plant and so far I have not killed it! This is kind of a test run for me and if it produces buds I will plant some more of the seeds I have. I just have a question about when and where exactly I should top the plant. Included are some photos. Also, I have noticed a bit of "leaf burn" i'm not really sure what the correct term is. Its only on the tip of one of the leaves, not a very large spot but should I be worried? Also due to the lighting and poor camera it looks like the stems and leaves might be yellow, but they aren't quite as bad as the photos would suggest.