We made the mistakes so you don't have too lol although it is a part of leaning.Theres a lot of trial and error in this hobby as you might have already found out. Look up some aquascapes to help you get a idea. I usually like to have a set imagine in my mind to go off of while I do. There's three basic things I like to keep in mind when I aquascape for my reef, astheics,coral placement and a seamless look like you just cut out a peice of ocean and put it in your tank. I also like to have hiding places for fishes and such.It's so nice to be able to get advice from guys that have been doing this. I've been racking my brain on how to change the rocks to get rid of the dead spots but right now I'm at a loss.