Contact Zelensky directly, and offer the following peace terms:

Ukraine gets it's land back, everyone gets their own people back, war crimes are investigated. Inform him that if he takes the deal, I'll start issuing orders to surrender immediately, and we can sign whatever document and do whatever ceremony when people aren't dying. Delegate the orders to withdraw and surrender.

Call Trump and talk to him about future relationships with Russia. Immediately publish the phonecall so there's evidence of him violating the Logan act.

Then I'd schedule a to see a physician so I can get some Healthcare, and start bringing in real experts so I can fix the domestic problems Russia is facing. This'll probably include a translator because I don't speak Russian. My overall goals with the reforms would be restructuring the central government to be an extremely robust democracy, abolishing corporations and replacing them with cooperatives, putting together better (especially IT) infrastructure, and dismantling Oil production. Russia is already a place where online piracy thrives, so I'd probably lean into that, and make state-sponsored programs that make information freely available to the entire world.