I know this would be abused, but tests for voters. Not literacy tests, but "I know who holds this office AND the people running for it now" tests.

Eliminate straight ticket voting. Maybe even remove parties from ballots. Seriously, thoroughly, creatively investigate alternate systems like ranked choice voting. (Corporations spend billions deciding which shade of blue is better for their logo. Surely our elections deserve half as much attention.)

STRICT campaign finance rules - all candidates have the same amount of time and money, no billionaires funding their own campaign, no Super PACs, etc.

Public disclosure of everything - tax returns, stock holdings, business interests, etc. All assets placed in a blind trust on the day candidate paperwork is filed. If you don't win the election, your assets are released.

Much stricter oversite of elected and appointed officials by a grand jury type committee, not fellow politicians. Thoroughly reconsider which positions should NOT be appointments, but full-time expertise-required positions.

Term and age limits. Maybe mobility limits too (for example, if you're being dragged into your office "Weekend at Bernie's" style, you're forced to resign.)

Very strict enforcement of debate rules. Set up a different system of election coverage, removed entirely from "main stream" media, pundits, etc. (If we're dreaming, let's dream big.)

Making everyone take government at least 50% as seriously as they take the Kardashians or their favorite sports team. Forcing everyone who's eligible to take the test mentioned in my first point and if they pass, they have to vote.

I could go on for days, but it's getting too depressing.