You have all the powers that Putin currently does. Everyone completely loyal to Putin is now loyal to you. Enemies of Putin are enemies of you. Putin no longer exists, and there has been a clean and absolute transfer of power to you. The economic, military, social and political situations are the same as they now are. You are not inhabiting Putin’s body, you are just you. You’re magically transferred to the Kremlin. The world at large doesn’t know your past life, to them you have magically appeared as the new ruler. To everyone who knew you before, you just vanished.
Edit: no one knows your past life YET. They’ll quickly figure it out. You will not lose any support based on your actions in your past life.
Negotiate a peace agreement between NATO, the European Union, Ukraine and Russia, with the aim of:
Keeping control of Crimea and small parts of the Donbas in exchange for the land Ukraine gained in their Kursk incursion. This would give Russia access to a second sea port that can be used all year round, and unlike Kaliningrad, isn’t an exclave sandwiched between NATO powers.
Negotiating the immediate release of all POWs on both sides.
Obtaining a neutrality agreement to ensure Ukraine will not join NATO (EU or EFTA membership is fine.) Not really anything we can do about Finland or Sweden joining.
Joint Russian and Western aid in rebuilding Ukraine.
Lifting all economic sanctions (including those placed on Russia before 2022), travel restrictions and readmission back into the G7, Council of Europe, FIFA, IOC, etc.