re: What will you change when you become dictator?

Public school beyond 6th grade will have a competitive admissions process based purely on performance and intelligence testing. Those who miss the cut by a narrow margin can apprentice for a trade. Those who do even worse enter a public service corps dedicated to public works projects, litter collection, etc.

Medicare Part "D" is abolished.

No backing in to a parking spot... car drivers get fined, pickup drivers get a fine and a mental health assessment to check for delusions of grandeur, e.g. Big Rig Butters Disease.

Public service advertisements and public funding of TV / radio are banned.

A committee of grammarians and philologists is established to promulgate official standards for written and spoken English. These standards are mandatory for all public communications other than things that are clearly art. (So you can still play rap music on the radio, but you can't use the word "woke" on Meet The Press.)

Second jobs in a household are taxed at the highest marginal rate.

The homestead exemption is federalized and turned into a complete exemption from property tax.

The UN is expelled from New York.

100% tariff on any goods from outside of North America.