But please don't write in bold or colored/capital letters. It really isn't necessary and makes a post stick out unnecessarily.

You don't need a mentor or to copy someone else. Just be yourself. Preview your posts and correct errors before submitting them. Ensure that the text is both factually and grammatically correct. The last step is ensuring it looks good and is pleasant to look at. That means, no big walls of text without any order or structure. Create natural paragraphs where it makes sense and would make the reader stick around and keep reading.