How to start a test engineer career?

Question

Software testing

Hello everyone,
Lately (especially since I started working from home) the question of transition to the IT industry is becoming more and more interesting. In terms of background, he worked for several years in a bank and financial institutions, in the field of AML / CFT (AML / KYC / CTF) and often had to deal with testing various updates specifically for our department.
Now I'm thinking about doing this full-time, but where to start?
I will be glad to your advice.

Answer 1

https://itexts.net/files/pdf/savin-roman-testirova... - according to the classics, if you don't quite understand what testing is
* some things from there may be irrelevant