Like I said, to be a successful seller here on Fiverr, you need to offer gigs for skills that you can complete. Communicating in smooth, accurate, grammatically-correct English does not appear to be a strong skill for you right now, and, therefore, trying to offer it to professionals looking for English articles will likely result in you receiving negative reviews.
Wanting to learn and help others is a great thing to do. But here on Fiverr, you need to offer gigs for services that you can do very well. Figure out what services you do well, and build your success around those skills. Once you have a firm grasp on proper English grammar and syntax, then, maybe, you’ll be in a better position to provide the kind of articles English-speaking buyers are looking for.