Right. Now is the right time to start.
But it's too soon to tell if that effort will accomplish anything, because the effort has to be sustained through 2026 and 2028.
And the people showing up waving signs have to become politically active - not just showing up and going home, but writing their congresspeople and boycotting companies and knocking on doors to get out the vote and so on and so forth. Bernie and AOC can stump all they want. If they don't inspire people to act it means nothing.
The Democrats need a grassroots movement - as angry and passionate and hopeful as the Tea Party was - not just speeches by celebrity pols. It's too early to tell if liberal citizen voters will accept their responsibility to build that movement.