I think that most folks could have a very successful grow with plenty of light and half the nutrients and stuff that they usually use. I grow in Promix and can't speak for hydro/coco, or other processes, but the #1 problem is too much fertilizer (Bigger is better) followed by not enough light, despite it looking pretty bright to the average grower. If you can look at it, it isn't bright enough. Once you have 1 or 2 grows under your belt, you will see that the biggest problem is lack of patience, which includes flooding plants with nutrients they don't need (but they will make it grow like a giant, right?) or panicking every time a leaf dies. Let them grow. If they look good, then they probably ARE good and don't need anything more. Once you have a successful process, then you can start messing with different parts that catch your interest. Until then, learn from your mistakes and go easy on them until they are growing big and bushy!