You can get science-based information about language learning in childhood in the form of comics.
(Linked site: https://kotoboo.org/)
Q, How do children learn their Mother tongue?
Q, How does a baby learn two (or more) languages?
Q, How language learning opportunities can be created in screens？
Q, What home moments are best for learning language?
Q, What is the giant leap a child needs to get to written language?
Q.Are sign languages processed by the brain like spoken languages?