Trump needs to concede and get ready to step down peacefully in January. Biden will have to be a truly remarkable president to avoid civil war I fear as any more division will rip this country to pieces but the first step towards avoiding that future is for Trump to respect the peaceful transfer of power. That is what is important.
If this is what you believe, I highly recommend writing to your House Rep or Senators. You saying this will have much more sway over their opinions than us libs or some leftist org, and I can promise as someone with friends who work on the Hill that members of Congress can be swayed by what they hear from their constituents.