Would you might clarification what you mean by from the start? Are you more interested in how Lenin's biography shifted to communism or about his ideas and application of them (in the context of party and historical events)?

Agree you looking to understand the Democratic and popular processes within the revolution and transformation of the state?

There is an excellent answer in this subreddit (link) about the November revolution that describes a lot about the dual system of power and how the revolution happened (with a focus on how Lenin got into the soon to be Soviet Union by train, speaking to people and the coming to power) that might interest you.