For plants i would go on to buceplant (the prices are a little high because of inflation) and in the search bar on the website i would turn on the filter and select care level easy. I have never owned a GBR, beautiful fish though. If you go to liveaquaria on line you can click GBR and if you scroll down a little on the species you can find some info. On liveaquaria it tells you the fishes temperament and GBR is a peaceful temperament so i recommend corys, kuhlii loaches, pleco. For hard scape I recommend just looking around your LFS and look for rocks and sticks that look enteresting.