Mathematics and algorithms for a lawyer. How to make up for a minimal background of knowledge?

Question

Mathematics

Not everyone studied at specialized universities. I'm a lawyer who didn't teach math from the word at all. even at school, no one emphasized it.
Even in php I didn't need it.
But now, merging into rust, python and programming in general, I understand that there is not enough background, fundamental knowledge.
Basic mathematics, graph theory, automata theory, etc.
What can you read to a complete noob and restore knowledge gaps on your own?