This section is under construction. For now, here are some helpful links
There's no end to the ways you can get involved. Get creative! Talk about our changing climate and the amazing things people are doing to safeguard our future. I believe that local grassroots organizations are far more effective than national, conventionally run NGOs, but we're all on the same team. Start where you're comfortable. Just be sure to research what it is you're supporting, as sometimes large 501(c)(3) organizations make compromises that you would likely disagree with.
Find a campaign with 350.org
Find a Rising Tide group near you
Find a Sierra Club chapter near you
Get involved with Greenpeace in your area
Some of these groups have more of an "environmentalist" bent; I know that's a dirty word for some folks. If these groups or their campaigns don't align with what you're looking for, their members and organizers ought to be able to point you in the right direction. Good luck and welcome to the movement!