i got married and reside in nj, but my husband lives in Florida, idk his address .. How do I go about a divorce

You can file for divorce in New Jersey if you have been living here for a year.  You will have to serve him with a copy of the divorce complaint, and will have to send it regular mail and certified mail to the last known address.  You will also have to send something to the court if he does not sign for the certified mail, and indicate that you sent it certified and regular mail, that the regular mail did not come back undeliverable, and that he refused to sign for the certified mail.  You will be able to find a last know address for him online using something like White Pages, or something similar.