I totally understand your pressure. It is ok to think that but if people love your fanfiction maybe you should try. You should post a paragraph and an intro if you get at least 100 votes or more. If it goes well, continue to your heart's desire. I'm here if you need me.
@TheStarry_Night One more thing write a spider-man imagine somewhat based on your story if you are a little nervous. That way you can get comments on your story.