What was the main change brought about by the Bolshevik immediately after the October Revolution?

The main changes brought about b the Bolsheviks immediately after the October Revolution were:

(a) The Congress of Soviets on 8th November 1917 proclaimed to all peoples belligerent states to open negotiations for a just peace without annexation and indemnities Russia withdrew from the war, though a formal peace treaty was signed with Germany later, after ceding the territories that Germany demanded as a price for peace.

(b) Following the declaration on land, the estate of the landlords, the church, and the Tsar was confiscated and given to peasants.

(c) A Declaration of the Rights of Peoples was issued conferring the right of self-determination upon all nationalities.

(d) A new government called the Council of People's Commissioners, headed by Lenin was formed.

(e) Banks and industries were nationalized, and old noble titles were banned, and new uniforms were designed for the army.