If u become Prime Minister for day what major changes or steps u take

A day wouldn't be anywhere near long enough. Firstly I would make some rules about the conduct of politicians while attending meetings. If you have ever watched them you will know that they are worse than children in the name calling and poor behaviour they get up to, but that's a minor thing. Get the minister responsible for each portfolio to work out whatever needs attention in their area of responsibility and then try to work out plans to fix them and whether the ways of fixing things is short term or long term and what resources can be devoted to fixing problems. There are a couple of main problems with most politicians 1) They are in it for self first, then faction, then party, then politicians in general and then maybe in a distant last place the public. 2) They are notoriously short sighted. It's almost like a beneficial program cannot be started as someone else will be in power then and they might get the credit for it so it never gets started. But mostly actually do something rather than all this posturing, use of high price consultants and "necessary" overseas trips for research.