Which series on Netflix / Prime are good for learning / improving English?
An English book
I do not like to read books I'm sorry I find them boring and uninteresting
I also mean the textbook
I have no textbook
The best is you are watching shows / movies you already know, this time in English and with English subtitles. BBC - Radio, Popcasts, etc. Are also good - you get used to it by the way the language is spoken and your subconscious also perceives a lot. - Of course, books in another language are boring for the first time, but you can get short stories in English - (be it thrillers, comics, etc.) depending on what interests you.
None. Understandable is material that corresponds to your language level, or a bit above it, but can be analyzed with your knowledge. Get your level (for example, through an official test) and then a language course that promises new knowledge.
Watching movies, etc. Is ultimately just fun when you actually understand what's being said (see above). At best, listening comprehension is trained. In order to be able to learn effectively with films or the like, there must be pre-relief (for example, an English conversation about the possible content), guided viewing, and subsequent exercises and discussion about what has been seen. Just by looking and eating popcorn, the English does not improve.