The connections we have with individual people, as individuals, are world-changing. Think small. Don't think about fixing the world, think about fixing things for your loved ones, your local community, your town, etc.
There's an idea I read about recently in Emergent Strategy by adrienne maree brown which says to consider a flock of starlings, wheeling and swooping above a field. There is no leader; each starling acts only in accordance with the starlings that are nearby, yet all together they create a beautiful, intricate, coordinated pattern.
Be a starling and act according to your nearby starlings. Change is made by a thousand small actions, a thousand small starlings becoming a whole flock. I don 't think I'm doing the idea justice here, but it's brought me a lot of comfort <3