Most Democrat politicians are neo-liberals, meaning they are conservatives by all global standards.
We need progressives to take over the Dem party. If you are young and progressive, especially if you are in a shitty dead-end job, run for office. Do it. Local or national.
Sign up, go through the process, announce it for fun on social media. If nothing happens, it was a funny, enlightening experience. There is no upper limit to what can be accomplished if you actually start winning races, though.