A few things that are accessible within the USA include:
- Participating in mutual aid programs
- Campaigning on the local level, including for positions like poll watchers
- Making your voice heard in community events in general
- Joining your local DSA, networking
You need to enact Approval Voting and Proportional Representation by referendum. That way you can vote for candidates you like, instead of against those you don’t. Get hooked up with Election Science to get started.