Read the literature on data structures and algorithms before studying PL or in parallel with the study?

Question

Programming

Or even after some programming practice?

Answer 1

There is an assumption that the order is not so important, you will re-read some points again.
There is also an excellent platform for sports programmers codeforces.ru !
It seems to me that this is a must do for some time for all developers. Determine the measure yourself, depending on your interest. For product development, strictly speaking, you do not need to be a champion in algorithms.
Codeforces is also good because it supports many languages, you can practice, including with the development of new ones.

Answer 2

Theory is better supported by practice. Learned a hash map - implemented it. Learned binary trees - implemented.
In parallel, you can study the programming language, data types, OOP, etc.

Answer 3

Separate "flies" from "cutlets", means of implementation from methods of implementation.