Google will still show the contents of what was posted in their search results
Yes, it will indeed be possible for search engines to find your essay if you post it here, so don't post it if that is a concern for you. Maybe we can just do some practice writing so you can correct all your mistakes and become an expert.
If your essay is supposed to be done in class, give it a try! You seem to write very well, so you should feel confident. I know what you mean about noise and distractions, though. Let's just do some practice essays, so you'll be ready to write in class.