Encryption skills

Question

How or where can I improve my knowledge and skills about cryptography as much as possible?
I know sololearn offers some encryption lessons, but I feel it's not enough
any language, website, or videos on youtube that you find useful is considerable

Answer 1

start here https://www.sololearn.com/learn/9850/?ref=app beyond that Google it.

Answer 2

BroFarOps I know there is this lesson in sololearn, I've read it many times to fix all the knowledge, but I feel that this is not enough
I want to know if anyone who has an advanced knowledge in this matter knows any other course or tutorial on the Internet to indicate me

Answer 3

yes there is more on Khan University, udemy and freecode playground, as well as others....