That's the thing though, you first have to show to people that taxing the wealthiest actually does work (meaning it doesn't magically make them poor or tank the economy, while providing solid tax revenue). Then I think you can possibly start looking at expanding on that.
I think some of you don't realize how gaslit people are on this bullshit American Dream that they've been sold. I've known lots of poor people who consider taxing the rich horrible because they genuinely think its possible for them to attain. They do this while struggling to afford to live day to day. But then they'll rant about corporations and CEOs, but somehow never make the connection.
I think an easier way to explain things is to get people to think about it in a way they can better comprehend. $1000 a day of income would be $365k. Triple that and you'd be a millionaire (just in income, meaning, that's from a single year). So a millionaire is making about $2800 a day. That's as much as a good amount of people are making a month, meaning just a single millionaire is making 30 times more than them. And Warren's plan is talking about targeting only to people making 50+ times that. Meaning, unless you're making 150 times what someone making $33k a year is, things you won't be paying this extra tax at all, and even then will only be paying an extra 1%.
And the revenue from this will enable us to move to things like UHC which will save people a lot of money on medical costs, which will save even middle class (although maybe as part of a transitional period you factor that into the progressive tax rates, so that people end up the same and the cost savings goes towards smoothing the transition), which effectively amplifies things for lower income people, who are disproportionately affected by health care costs (but transitioning where many of them had no or less coverage than UHC would offer, you'll have increased costs, but that should fall over time as better consistent medical care reduces the severity and costs of medical conditions).
Which, maybe you could meet halfway as well, where they could offer a voluntary extra tax rate. Incentivize it some (maybe offer some bonds or something so that you could get some later return for that), lock it to certain programs (health care, education, maybe even specific programs, so make it as part of transitional UHC, or program for subsidizing college education; so it can't be used to keep ballooning "defense" budget or something).