Reddit reviews Analyzing Baseball Data with R, Second Edition (Chapman & Hall/CRC The R Series)

Analyzing Baseball Data with R is basically the textbook when it comes to learning R with baseball data. Second edition just came out with some updates with regards to Statcast data. It's like $50, though, so if that's a bit out of your reach, I might suggest looking at DataCamp's R tutorials or something of that nature.

I've been going through this book. Would recommend.

Then read Analyzing Baseball Data With R

There's a 2nd edition of this book coming out in December with added chapters on tidyverse and using statcast data

Not interested, but related to your mention of R, there's a book about analyzing baseball data using R. Haven't checked it out yet but I plan to.

I would suggest you take a look at the following book, https://www.amazon.com/Analyzing-Baseball-Data-Second-Chapman/dp/0815353510, or the Stanford sports stats class, https://web.stanford.edu/class/stats50/references.html