This is a plausible list of what Democrats would like to do staring in January. It leaves out things like quashing the 2nd Amendment, but you get the idea.
However, I’m going to suggest that Trumps final two years of lame duck presidency will prevent that agenda. I’m expecting mostly a legislative deadlock. It would be a good thing. That leaves only the one thing the Blue Party will be able to do: investigations and prosecutions. Trump cannot veto those activities.
However, the state governments will not be hindered that way. They will roll out as much of that agenda as they can within their own state borders. We already have some Blue states talking about secession if they can’t get their way. I’m expecting at least a few of them to try something along those lines.
State governments will become the main venue for both sides, by the way. Red states will not sit idly by while the Blues attempt to take over the US. The next couple of years should be quite entertaining.

This comment made me laugh:
“Still not sure what happened in Texas. Did they go gay or are they just experimenting.”