Where to learn eight characters and four pillars, and which books to read first, please give directions from experts.

Sheng tong Ming hui

Yuanhaiziping

Shenfeng Tongkao

Di Dian Mu

Numerology and protocols

Wait, these are all ancient books, before reading them. You can read the Introduction to Four-Column Prediction by Shao Weihua and Chen Yuan before reading the ancient books.