No president does ANYTHING on his first day in office, other than get himself sworn in. There are speeches to give and parties and such.
Trump has been told by the Supreme Court that he can break any law his sticky black heart can think of. He seems to have used his presidency for conning Egyptian dictator Al Sissi out of ten million dollars and Kim Jung Un out of two million. Trump's leadership style is pretty much along the lines of a Mafioso capo di tutti capi. Trump is a thief and a total ratbastard.