Donald Trump has set the scene for change in the US  -  change that you have correctly described to be so necessary, not only for the US but right around the western world.
He has already retreated from some of his election policies which is somewhat disappointing.  One hopes that he will be strong in pursuing his policies but I foresee quite a bit of resistance from the “Permanent Government”, which is the bureaucracy remaining irrespective of who wins the poll. (Shades of “Yes Minister”!).  The other force he is likely to contend with is the power of finance  -  those with their hands on the levers of money can ensure certain things either succeed or fail.