Thanks for the advice all! Really appreciate it. I will def. look into online buying next time, but as for now I bought another 15 lbs live rock from LFS
(figi rock). I removed all the rock from the tank and then made the design I wanted outside the tank, then put it all back in. I did lean it against the back glass and made sure there were swimming and hiding holes/valleys for the fish, and also "bottomed" it out against the bottom of the tank.
When I took out the live rock that had been in the tank for about a month, I noticed something crawling on it. Freaked me out at first cause wasn't expecting it, but it looked kindof like a ladybug body (oval shaped) and kindof was moving on the rock sluggishly. Then I saw a couple more and they are pretty well camoflouged. Anyways, I put it all back in the tank and will take a picture of it to post here. I lost a damsel the next day though, not sure why.. maybe he got too stressed with new design?