Zachary K. Hubbard has made a deep study of Gematria, finding that it has great powers not only of explanation, but also of prediction. Here is a link to his two books. I recommend reading the first one first (Letters and Numbers), or at least the first few chapters, before reading the newer one, Number Games-911 to Coronavirus. The link is on his Patreon page, but the books are now free.
I also recommend Zach’s website:
Here is his Youtube channel, at least at the moment:
Zach is a bit rough around the edges, and you may not agree with his analysis, but I urge you to give him a try.