TED Talks are influential videos from expert speakers on education, business, science, tech and creativity, with subtitles in 100+ languages. TED consists of over 3,000 lectures mainly in English, some of which have Polish subtitles. A beginner will certainly appreciate the possibility of using subtitles, and with time, when our skills are already greater, we will be able to calmly go to movies where Polish subtitles have not been made. It doesn't matter if we watch these interesting lectures with Polish translation or not, we will undoubtedly carry a whole bunch (especially) of the vocabulary we are interested in, as well as develop our listening comprehension skills. Listening to the language will in turn also bring ease of speech.
If you are an app freak, it's good to use different applications to learning English too. I will show you many handy apps to keep learning English in a few minutes. Furthermore, I will show you many online dictionaries and websites to learn languages.