[Cyclamen]

Well, if you are fluent in Japanese it will be easier for you to connect in your mind the words you already know to their writing in kanji.
But you can also learn kanji, its meaning and its pronounciation without being fluent in Japanese.
It's the same, some people prefer the first method, some like the second.

But I think that learning first romaji then the two alphabets, is a terribile way to learn japanese (this is true also for every language which doesn't use roman alphabet, such as russian, arabic, thai, etc.).