If you can line up volunteers who can answer questions via e-mail, that will be of great help in getting your paper started. Your parents association would be a good place to start because you are likely to find parents who are in computer programming and would agree to help, or parents who work for large companies with technical support departments. Those parents could make the initial overtures to the companies to seek volunteer assistance for the student paper. The companies might also be willing to buy some equipment and software for the newspaper. And don't forget the local newspaper for both journalism and technical advice.
Many newspapers take on service projects in their communities.
The Helping High School Journalists page at the Web site of the American Society of Newspaper Editors lists a number of ongoing projects in which newspapers are helping students. An online student paper would do well to have some professional journalists to turn to when questions arise about journalism ethics or standards. Any teacher thinking about starting an online paper would do well to line up a local journalist to give advice, even if the interaction is primarily via e-mail. And it should not be too hard to line up a journalist willing to visit the class a couple of times each semester.