The most accurate and serious articles about the analysis of Satoshi Nakamoto early days is from our co-founder Sergio Lerner [1]. For example [2]. He is an authority in the field (you can easily check that) so in any case I recommend OP to review the data with him.

[1] https://bitslog.com/

[2] https://bitslog.com/2020/08/22/the-patoshi-mining-machine/