first off, the Manga forum is for discussions related to professionally published manga. if you want to discuss making your own you need to go to Comic Creators in Art Discussion.
second, you don't need to name your work right away. work on it a bit, try things out, see where it goes, if it wants to go where you planned or it wants to go another way, just let it flow for a bit without a title and see if it names itself. sometimes that happens. and remember, let the name fit the story, don't come up with a name and try to force the story to go with that.