Hi.Im new to reef and looking for help...

hi i have 50 gallon acrylic tank-just started today.
60lb live sand
30lb stone
Mag 1800GPH pump-pumping from basement to first floor (vertical pipe lenght is 12Ft) and 3/4" pex pipe-3/4" bulkhead
drain- 3/4" pex pipe -3/4" bulkhead
bulkhead are drill on back and 3" from top...
sump is 30gallon
heater-300Watt
skimer-Reef Octopus Classic 110 INT Protein Skimmer
power heads x 2-Hydor Koralia Evolution 550/600 Aquarium Circulation Pump, 550-600 GPH
light-Current USA Orbit Marine Aquarium LED Light 48"-60"

No corals and no fish yet...
can anybody help my what kind corals are good for beginners and my lighting?
how much water im getting thru 3/4" bulkhead/Hr. ?
thank you.