Tell me any method to learn 3,000 new words

[crashpiblic]

I have done a question with the same topic before, I am learning german, luckily i know to read almost perfect german, and i know grammar almost well I have no difficulty in it but the main problem lies in memorizing new words, I read japanese manga they are similar to comic book, and every new word i underline have vocabulary translated into my language and i write them in notebook do you know any other technician how to teach besides illustrated pictures because she in a few words does not work, for example in names it is easier to use photos to remember, but in adjectives and verbs that are most important to understand a language does not work for me, I used memrise , but it is very boring. boring to repeat every time and again when i forget any word I also lose the motive, do you know of any method that makes it fun and easier to memorize the words lest i forget, I aim to learn at least and 3,000 new words