I would transplant to bigger containers. I also recommend you read until your eyes bleed and your head ant hold one more letter.
Then I recommend going into the problem plant section and look at pics of plant probs and try to diagnose it. read on to see if your right. Once you learn to speak the language of the plant and understand what she is telling you then you should have very little to fear. Make mistakes learn from them. Take ONE plant and experiment with it ( especially if your making clones) see what it can handle and get to know her and she will keep you very happy.
My best advise