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Well the president in a parliamentary system of government holds more power than the prime minister really but the first thing I'll do is to create an equality between the president and the prime minister so that there will be check and balance between two two rulership entities, thereby reducing any chance of abuse of power from the president.

The second thing I'll do is to focus on the constitution since I'll be staying only one day and the changes I'll make will last a long time, I'll make laws to apprehend corruption laws like death penalty for capital offences such as rape and murder and public embezzlement so that corrupt judges will never have a chance to vindicate criminals.

I'll make public grants so that brilliant students can go to school without fear of money and of course I'll entrench this in the constitution.

Lastly I'll make the system of government to be constitutional democracy so that every action of every leader must be according to the constitution, this way crime and corruption will reduce

Here are the things that I would target first:

1. Make sure to get my hands on as much classified information as I can and then let the internet run red with it. 

2. Make sure to pull the rug out from under the banking system. I woudn't try to harm the banks but rather expose their flimsy stability to the public and let them know that they are in for a rough deal if they are trusting the banks.

3. I would not touch the fiat money - too many lifelines connected to it. I would rather make sure to get things in place that would ease the transition from fiat to crypto.

Create a website that accommodates complaints or criticisms and suggestions from the public. I will also evaluate the performance of the regional heads to find out that their work has been maximized or is still lacking.

I will not be grandiose. I tried to stabilize the Indonesian economy first, then the people's economy, then the level of education. It is not easy to reverse your palm, but God willing, if supported by honest and smart teams, that effort will be realized.