This is introduction. Impeachment itself will not occur until voted and approved.
Justified or not, it will be very difficult to for Biden to cast himself as a unifier after this.
At the end of the day, Biden is not the Democratic party as Trump is not the Republican party. He'll do what he wants and congress will do what they want and hopefully if any of it is too awful they'll stop each other and if they don't stop each other hopefully they'll get voted out sooner rather than later.
Trump is a symptom - not the disease. Often if you just try to treat symptoms the disease gets worse. We have a large fraction of the U.S. population that is disenfranchised/unhappy with things. It is various things. It might be things like gay marriage becoming federally enforced allowed. It might be higher taxes. It might be mainstream media/big-tech political asymmetry. It might be big govt vs not. It might be being priced out of your hometown because of people moving in. I'm not saying any of these things are bad or good - just saying that what are we going to do to actually heal? Voting your people in power and ignoring a very large demographic is not going to heal anything. It will make things worse. We have to engage with each other - not disengage.