I have another alternative suggestion for you. Now you can drive to Secaucus and take the train from there. While the ferry ride is my favorite means of getting into Manhattan, especially downtown, Kathleen is correct in suggesting the train as the best method. It's just nice to have a backup plan.
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Call me when you are ready to look at homes, condos or townhomes in any Bergen County town. I have 25 years in the industry and would be happy to show you some great places to live.
Go to njtransit.com for both bus and train info.
Type in starting point then final destination of Port Authoriy for bus or World Trade and Penn Station for train options.
Good Luck and welcome to NJ,