From an ML perspective, waiting until after the revolution is decidedly too late to construct socialism. We can hope they spontaneously decide to do good things like the Paris Commune tried to, but a dictatorship of the proletariat needs to be the organizational basis of the revolution to hold power after the revolution. The point of dual power is that a revolution isn't supposed to be wiping the board clean and then rebuilding from scratch, but toppling the main impediment to the governing bodies that you've already built up.
That doesn't mean it's totally impossible to beat the liberals and reactionaries in mud-wrestling, but I would guess that having no record and saying you'll do socialism is not going to move people who were ruled over by immensely non-socialist parties that called themselves socialist. I think probably the best you can realistically hope for and pursue is to just try to fight for the "democratic" part of liberal-democratic policy so some strongman doesn't take over.