It will be VERY difficult to fix the Supreme Court without burning it to the ground. Trump appointed young, right wing extremists who will likely serve for 40 or 50 years. If one or more of the old conservatives retired over the next few months he will do the same thing again, likely someone who is even worse. Impeaching a Supreme Court Justice requires a 2/3 majority vote in the Senate which is stacked to favour the Republicans by the ridiculous electoral college. The chances of reforming the Supreme Court in the next lifetime are approaching zero.

Reform, true reform, will involve fixing the Supreme Court, elections, and education but also regulation, banking, and wealth inequality. The Republicans have for years obstructed when the Democrats were in power and lied and cheated and stretched the law while they were in power. It's a one way valve. The democrats can't do anything because of Republican obstructionism and they don't seem to be able to stop the back sliding when they are in opposition.

I would love to see a government made up of AOCs, and Kat Abughazalehs, Zohran Mamdanis, and Jasmine Crocketts but even if you end up with a government of those people the Republicans who are left and the Republican governors will obstruct change for a generation at least.

In order to effect real change you would need at least 3/4 of the states to be solidly in Democratic hands with 2/3 of Congress in Democratic hands.