If you were president of the USA, how would you fix the nation?

Let's say that you somehow became president and you were tasked with fixing the nation to make it fair and just for all. Everyone knows what's wrong with the country but how would you fix these issues from top to bottom? In detail, how would you repair the nation? Be as comprehensive and thorough as possible.

(I also partially want to know this answer myself because I'm a doomer and I really would like to know how a president fixes a nation and how they can easily mess it up too; I want hope).