Stream films noir online legally through a number of nonprofit websites dedicated to compiling public domain resources for the purpose of education. Internet Archive has an extensive collection of American noir films from the 1940s,1950s and beyond. Films are conveniently available for free instant viewing.
Netflix allows members to stream an unlimited number of films, including films noir, for a low monthly membership fee. Not all films are available for instant viewing, but this option is being added for both new releases and obscure classics on an ongoing basis. Consider investing in a subscription to Netflix for unlimited, legal viewing of film noir classics.
Develop a working knowledge of various free online resources from film noir experts. The internet has extensive information on many classic and recent noir films. Reading film history, factoids and viewing guides can facilitate a fuller appreciation. IMDB and FilmPedia both contain extensive, encyclopedic information on most films made in the U.S.
Seek membership in a free online group that facilitates discussion with other film noir buffs. Search social media for existing groups open to new membership that can lead to online connections with movie fans around the world. Consider starting an online group or live meet-up group to organize group viewing and discussion of a designated noir film series. Organizing a movie club can lead to a deep appreciation of noir films through avid discussion.