It's not about just watching it - the interest for the language comes by understanding some words in subbed animes - it's probably with something easy like
ありがとう
(arigatou => thank you). Even some people who aren't interested in learning a language prefer watching anime with subtitle just because they like the way the language sounds. It's where the connection starts.
Another step for the interest in Japanese is that animes include music, especially the opening and ending themes. The lyrics are written on the screen while the music is running.
With the help of subs you can at least understand the text, but when you see the language in its written form it's still something where you have no idea how it works at the beginning. It's because it's simply too much at once. You are simply overwhelmed!
The easiest way would be to learn the Hiragana letters gradually with some important words you may have already collected while watching anime. Same goes for Katakana - because you'll notice the amount of foreign words for which they're used.
But how to learn these letters? Print out a chart of both sets and try to find some mnemonics! For example た looks similar like meaning: ta. Try to memorize these characters step by step and be consistent repeating them daily. Also try to build some words.
I'd recommend to have an deck with the Anki flashcards on your phone. The Android version is even a free one and you can have an account which is connected with the PC version. Such decks are free available to download.
And the following is also an interesting way of collecting vocabulary: Create your own deck where you collect your words in Hiragana. I'd start with easy stuff like nouns you can see around you.
Example: かがみ (kagami => mirror) or いす (isu ==> chair). Continue with adding more and more words you get from lists, from anime or even songs.
This is just an example how to start - but that's just the beginning of a long way...
But how to learn these letters? Print out a chart of both sets and try to find some mnemonics! For example た looks similar like meaning: ta. Try to memorize these characters step by step and be consistent repeating them daily. Also try to build some words.
I'd recommend to have an deck with the Anki flashcards on your phone. The Android version is even a free one and you can have an account which is connected with the PC version. Such decks are free available to download.
And the following is also an interesting way of collecting vocabulary: Create your own deck where you collect your words in Hiragana. I'd start with easy stuff like nouns you can see around you.
Example: かがみ (kagami => mirror) or いす (isu ==> chair). Continue with adding more and more words you get from lists, from anime or even songs.
This is just an example how to start - but that's just the beginning of a long way...
