Your impulse is correct. We need a Green Sweep in both House and Senate. Your strategy is completely flawed.
There is NO WAY a Green Party can take power in the US. The only way forward is for the Greens to take control of the Democratic Party.
Use it as a shell, just as the Trumpublican’s have taken over the GOP and are now using it. That's the ONLY realistic road to power.
You should be pushing Green Democrat Climate Hawk candidates for every spot on the ballot. The party can be taken over but it will require a bigger base than Bernie's painfully White crowd of followers.