It will be strikingly similar to the last 4 years but the partisan narratives will simply flip in various ways, as will those of allied media. The bad things that the Trump admin did in his first term that became suddenly tolerable, ir even "good" under Biden? They will be back to being good again. Dem politicians will be back to calling themselves "the resistance" despite losing another layup because they could not do more than campaign on "at least we aren't them" while presiding over a genocide and economic decline for the average person, both with intentional policies. Remember that they are all PR and cynicism and are lying to you about what they will do, as they are not beholden to a disorganized public in any way.
To be clear, bad things will be happening. It is only reasonable to feel some despair for them, but if you can allow that to motivate you to substantive action you can escape merely being a witness to suffering and can begin to work materially against it. Much of that suffering was going to happen anyways or a different form of suffering may have happened under a Harris regime. It's not like Democrats did much with their power, they tend to pretend they have no party discipline or power even when thry have the presidency and Congress, so they allowed the major shifts at state levels to occur largely unheeded and served a right wing agenda at the national level. So it is important yo ask the question of what action you can take that does not depend on expecting Democrats to save you. They won't. What we need are other organizations, ones that organize independently of ans often in opposition to the Democrats, Dems who otherwise suck up all political energy demanding improvements to people's lives and turn it into more cops and wars.
So, the two ingredients to effective organizations are political education and organization building. The former is just an organized form of reading and teaching, and it is essential because we have all internalized false ideas of how politics functions. They are taught to us by the ruling interests that keep us disempowered *because * this keep them in power. The latter is about growing and improving an organization so that it can have greater and greater leverage and develop strategies for gaining and wielding power (and power is not things like letter writing campaigns to already-elected ghouls, it is making demands that must be met or else).
You can enjoin this kind of project in many ways. You don't need to jump deeply into a hardcore organization straightaway; it can be useful to join one that is only oushing yourself moderately at first. Maybe a mutual aid organization or a single issue or single community group. The important thing is that it is of the left and therefore not of thr Democratic party. You can also engage in your own political education independently if you'd like, which can keep the pressure down when you are first starting out with irl left work.
And of course please do rely on whatever community you already may have, including here. I am happy to chat here or via DMs if you'd like and can answer basically any question you might have. I'm also happy to recommend readings that you may find useful or helpful.
Don't forget the material basis for these shifts! While The Discourse of "practical" truangulating centrists tends to show this rightward path, it is because (1) they were already fundamentally reactionary, they tend to just use this logic as an excuse for why they tolerate far-right positions, and (2) the right is supported by the ruling class to address some of the "problems" it creates, like a marginalized underclass that wants enough income to feed their children, housing, and safety from violence.
The shift right is not driven simply by debate or ideology, but by the arenas where degradation in material conditions due to capitalism meet the ruling class' need to deflect blame to the marginalized (who they can reap larger profits from) to placate the less marginalized. Racism, nationalism, and extermination campaigns are created and maintained for the interests of capital, with the common people being pushed and prodded to fall in line with repeating the (usually ad hoc) new or recycled scapegoats and underclassrs. Wouldn't want you to point blame in the right direction!