Even manga-influece is kinda weird. The thing is that the "manga" doesn't have a defined style, and this has been proved countless of times by different mangakas. The thing is that the line that separate comic and manga is very thin, soo much that the only possible difference is the cultural one of the authors, and even this one can be crossed ones the authors separate their work from the cultural canon.
Now, this is not subject to kill you or something like that, but we tend to be kinda blunt about this with many new users, because this has been a subject for a long time ago, and most of the new users come from this only mono-vision on the comic industry where they have only been influenced by mangas, without knowing how extensive and deep the whole medium of comic books is.
My tips are:
-Set a basic goal or thesis for the story. A thesis is an idea you want to argument through the story and a goal can be provoke in a emotional level to the reader (there are many different goals).
-Set a main character, only one; there are stories that use more than one character, but if you are a first timer, use only one, it's really hard to place more than one main character in a cohesive story. Also to clarify main character: Harry Potter is the Protagonist, Ron and Hermione are Secondary characters. Secondary characters can be deep and complex, but that doesn't make them protagonists.
-Set moments that change the story, this can be by using the 12 steps of the hero or sydfield paradigm (use google), to get and idea on how to structure your story in a emotional, narrative and a productive level.
-Cause and Consequence, never become a mad god who just play with the characters, you just place the setting, the characters are the ones who made mistakes or success, and so, every event on the story must be through cause and consequence.
-Keep it simple, I know a lot of people want to do this big one epic story that is going to hook the audience forever, but trust me, neither of us have the experience, talent and time for that, so be realistic and keep it simple, do a short story with a meaning, and let those crazy epic adventures for ones you get the experience.