QA courses for an IT specialist?

Question

IT education

Hello. Maybe you know a sane and free QA course?
Basically, the courses that I saw focused on "entering IT", for generally oaky ones and for a lot of money.
I need to know what exactly and how kuei are made, for a general understanding, and of course, to use basic knowledge proactively and in general. It is also necessary about the manual (I don’t understand at all how their knowledge and practice are systematized there) and preferably about automation.
Thanks in advance.

Answer 1

https://fintech.tinkoff.ru/study/fintech/qaengineer/

Answer 2

https://svyatoslav.biz/software_testing_book/ seems to answer all your questions, but a little boring