Gorgonians are not good start corals.
I would start with the hardiest: Zoanthids and mushrooms. If you want Xenia it can go in early too. It is hardy, but is sensitive to changes in pH, temp, salinity, etc. so it needs a long acclimation. After that you can move on to hardy LPS
(most popular is Euphyllia spp.), hardy SPS
like Montipora spp., etc. Then you can move on to more challenging LPS
, and clams. Obviously you need to stop early if your system can't handle certain corals because of lighting or other issues.