CO2 is key!!! And, having a nice, thick, and lush HC carpet already established will help you immensely!!
You could start adding some hardscape now, if you wanted to. Do you plan on adding additional plant species, and if so, what? You should have enough lighting in order to grow just about anything in there!! Just be careful of algae; with so much light, it could be a potential problem. Go easy on the photoperiod for starters, and keep the water column lean. Then, gradually start increasing both after about three weeks. Especially if this is going to be an Iwagumi-style tank, take it slow, and be patient!! Best to go too slow rather than too fast and end up with an algae nightmare!!