Is it possible to grow from a tester into a security specialist?

Question

Software testing

And in general, how much are software testers in demand? Are their jobs interesting? And how much do they get in Saratov

Answer 1

No, you cannot grow into another specialty. Testing is not a stepping stone to becoming a programmer or security specialist. It's more of a stand-alone staircase.
Yes, the second time you will climb the next staircase faster, but longer if you had initially approached your own staircase.
Regarding the demand and other things:
1. If at the interview you cannot explain why you are interested in testing, you will not be hired.
2. If at the interview you say that testing is a temporary option for you, they will not take you.
3. People everywhere get as much as they agree on.