I’m going to answer this in a way that will help a larger swath of people. Generally speaking, doing social media and google searches (or any search engine, for that matter) will find you most of the left-wing organizations in your area. Failing that, you might be able to find them by asking around. Most of the major organizations have a chapter in every state, though if you live exterior to a major city you might have to travel a bit to get to organization meetings and meetups. If no groups exist in your area, you can always start one. Either by starting ground up and organizing your friends together, or by petitioning an existing group to open a chapter near you.