@Twia I actually have quite a view, because I try my best to purchase copies of manga I really love to support the author. I can read some of them if they have fuhiragana (so, when there's hiragana explaining how to pronounce the kanji), but I have very much given up on ever learning more than like.... toddler level japanese lol
I like having them though, because I know what's going on due to kind scanlators and I have the security that even if the scanlations get shut down or taken off the internet eventually, I still got the pretty pictures
As for learning japanese with them, while I didn't quite get into it, a friend of mine used them as a base and now he's gotten to the point where he's getting a PhD in the thing so.... It is possible. I guess it depends on what your personal style of studying is!