The cool thing about voting is that it's not mutually exclusive with any other action.
You can assassinate a Nazi, cast a vote, join a protest, and burn a Tesla dealership down all in one day.
So... vote. It's easy and super low risk. Do whatever else you think will make an impact too - but in addition to voting, not in lieu of. And I don't just mean the big elections - voting a Nazi off of your local school board or w/e is going to make a bigger impact to your community than any dipshit in DC.
It may not fix the country by itself, but it's a tool in the box that we need to use every resource from that we can.