@clhendricksbc modern mass protests that are not situational and local to where the problem is are STUPENDOUSLY ineffective outside of generating networks and camaderie. See: Iraq war protests, Women's march, BLM, etc. It ain't the 60s anymore...
The most effective low-effort remote help is likely donations to the ACLU.
More direct help is almost certainly organizing with the Democrats and/or the DSA.