Cant see your Nitrates being zero as there will always be nitrates in a tank to a certain degree, but thats just nitpickin, Do a large waterchange and start adding your CUC.
Choose types for all aspects of the job, Nass snails, Cerith snails, Turbo/Astrea snails, Trocus Snails, Red or Blue Hermit crabs. Add these slowly and not all at the one time. Dont forget the extra empty for the hermits as they change abode quite regular and will kill snails if they like the look of their shell.
Regards
BigC