Just writing the kanji over and over is not going to force the meaning into your head. You need a good Japanese to English dictionary. Look up every word you don't know. Writing the kanji along with the meaning next to it over and over will help you learn some vocabulary.
Just knowing the meaning of each kanji by itself doesn't mean you'll understand the sentence. You need to know the grammar too. So while you're at it, pick up a grammar dictionary as well.
Dictionaries:
White
Personally, I think you'd get a lot farther by working through a good Japanese textbook instead. But if manga is your preferred study method, go for it. At least you'll be doing something.