help

hi bros.. im new here.. i just bought a tank n thinking of starting on marine.. anyone can teach mi how to setup?? i got marine water circulate in my tank for 3 days alreay.. i dunno wad i should buy.. my tank is only about 2ft.. thinking of starting a small one 1st.. as im a student also.. anyone can offer mi those things i should buy.. im thinking of a simple setup with small fishes.. about 5 will do..