What is the best way for a future programmer to teach English on his own?

The fact that knowledge of English at least at the level of “understanding what is written” with further improvement of knowledge is critically important for a potential programmer is mentioned at every corner. There can be no doubts, it is really useful, it is necessary and it is impossible to become a highly qualified specialist without knowledge of this foreign language. In this regard, I have a question. What is the most effective way to learn English? At the same time, for me personally, the emphasis on self-education is important, since attending full-time courses is impossible both financially and temporarily (no one cancels the main job, child care and household responsibilities). I tried to use two well-known online resources for learning English - Lingualeo and Duolingo. After review and comparison, the final choice was the first one. In addition to completing the tasks assigned by the lion cub, I try from time to time to read and translate programming-related articles in English, adding new words to study in Lingua (what I really like about this resource is the ability to create a personal dictionary of necessary words collected from different sources) . But the creation of this topic was due to my doubts - will this be enough? And perhaps there is something more specialized, focused specifically on programming? Can you recommend resources/books/reference books/textbooks, etc. for learning English with efficiency close to the maximum?