Get on Campus!
If you live near a college or university take advantage of events that are open to the public. Most college campuses will allow community members to use their facilities, especially the library and gym. Colleges may also host speakers and events that are open to the public. If you like sports, start following your local college team. There are sports fans for each college all over New Hampshire and even New England.
If you have a family member, friend, or neighbor that currently attends college go visit them! Ask them to show you around their campus; their dorm room, the café, the gym, an academic building. It's never too early to start exploring all of the different options available to you!