Watch a video with help reading subtitles... Pause at each subtitle if you want, navigate forwards and backwards, find the translation of all the words and save them in your flashcards.
Read original manhuas, when you don't understand a text, click on it and the transcription will appear with vocabulary translation and save words in your flashcards.
Create an account to be able to select from the subtitles the words you want to learn. And every day go to the review section to learn them sustainably.