Here is a list of other organizations that offer teen volunteer opportunities. Many of these have tasks that can be done in your own home on your own schedule.
Library of Congress – By the People
Somerset County Park Commission
Raritan Valley Habitat for Humanity
Franklin Township Recreation Department Youth Council
American Red Cross – Central Jersey Chapter
JerseyCares – lists various volunteer opportunities around the state as well as online
LasagnaLove – connects neighbors for home cooked meal delivery