Language revitalization is the revival to save a lost language. When the language goes, so does the culture. The best way to save the language is to just simply learn it. You can do so by taking classes through a school in your community or online. Speaking to an elder is a good way to learn the language firsthand.
Another method is to attend an immersion school where it is mainly language-learning based. Immersion schools are meant to put children in a learning environment similar to where they learned their first language.