Like Tarheel, I am an obsessive proofreader. I spot errors everywhere. When I see a sign or a menu which contains spelling errors or punctuation errors, I want to correct them. I don't pretend to write absolutely grammatical English at all times. I have been pulled up on this forum for things like comma splices but when that happens, I take note and I try to improve in future.
You're right that English can be a playful language but generally that applies to spoken English and things like poetry and song lyrics. The point of this forum, generally, is to help learners develop correct, grammatical English. Often, that is to help them to pass exams or to enhance their employment opportunities.
"You need to develop better habits" means that you need to learn to write correct English more often than you write incorrect English.
As far as I know, no-one here offers a free proofreading service. If you want to pay someone to proofread or edit your stories ready for publication, I suggest you find someone online.