Depends, what do you want to improve? If you are looking for general feedback, getting an editor or a coach to assist you can go a long way. Someone to offer

Depends, what do you want to improve? If you are looking for general feedback, getting an editor or a coach to assist you can go a long way. Someone to offer valued feedback. There is a reason writers so often thank their editors. Ben Franklin is an interesting story in how one can deliberately improve their writing. https://www.linkedin.com/pulse/20140820222906-7374576-ben-franklin-s-secret-to-becoming-a-better-writer https://www.linkedin.com/pulse/20140820222906-7374576-ben-fr... But it occurs to me you are equating success in writing skill with success in becoming a popular writer. One can be an excellent writer and still not be financially success or massively popular. 10 years of writing doesn't mean much. What do you mean when you say you spent 10 years writing? What have you done?