w/o any sw expereince your gonna want to go real slow setting this tank up - start with the live rock make sure it is fully cured and the tank has cycled then maybe add one clownfish (about a month later) if every thing goes well and you still want to do a reef setup then add some simple corals like mushrooms and zoos
but like ornatapinnis warned small sw setups are much more difficult then larger setups - your best option would be to add a sump of considerable size (30-40GAL) - small systems have bigger parameter swings - if a 100gal tank evaporates 1 gal of water that is one percent rise in salinity while a 10gal losing a gal in evaporation has a 10% swing
but like ornatapinnis warned small sw setups are much more difficult then larger setups - your best option would be to add a sump of considerable size (30-40GAL) - small systems have bigger parameter swings - if a 100gal tank evaporates 1 gal of water that is one percent rise in salinity while a 10gal losing a gal in evaporation has a 10% swing