Dear potential employer,
as I am going to show you in the next couple of sentences, I do posses the English language skills you are looking for. I am a proactive individual with a strong focus on meeting the deadlines and I would love to work on your content writing project. I also have an interest in a whole variety of topics and for that I believe the content I write is not only going to be on time and grammatically correct but also of high quality too.
While I do not have professional experience in writing articles, I do have experience writing engaging social media posts, writing memos and write-ups to online media and composing scripts and handouts on various topics for students to use. Let me know how I could show some of this work to you.
Hope to hear back from you, too!