Like, how did they manage to do such enormous task in terms of practical reasons, like the inner organization of the party, their main political goals, ways to create class consciusness, etc.
Also if there is a good read about it I would really appreciate it
combination of factors
growing inequality between rural/urban, poor&landowner, and mental/physical laborers... as well as all the old existing class divides such as nobility vs. peasantry & capitalist & worker, or clergy vs. layman had all stymied social progress in the country for a century while other Western countries were more or less advancing in these areas
WWI had re-opened those old wounds and created enormous swathes of competing national & regional power vacuums and opportunities for political gamesmanship
Bolsheviks & Mensheviks/Social Revolutionaries had already been drawing a stream of support since the 1905 Revolutions which also had taken place amidst a background of a war that Imperial Russia lost & was politically weakened in
The collapse of the Tsarist regime took place early in 1917 in what was called the "February Revolution", and so the Provisional Government which replaced it was merely a milquetoast bourgeois attempt at kiting lib "democracy & freedom" for the urban merchant/industrial classes. But instead of allowing this aristocratic takeover, between April & late Summer the army & urban workers & the socialist revolutionaries took up arms against the Provisional Government's intention to continue fighting WWI
The Bolsheviks weren't the only ones trying to take power either, look at the Kornilov affair for example. This was a precarious situation