There is no specific path to becoming a legal proofreader, but there are a few things you can do to give yourself a leg up in the field. First, consider studying English, journalism, or communications in college. These majors will give you a strong foundation in writing and editing, which will be helpful in proofreading legal documents. Secondly, try to get some experience working in a law firm or with legal documents in some capacity. This will help you to understand the language and format of legal documents, and will make proofreading them easier. Finally, consider taking a proofreading course or two to brush up on your skills. There are many online courses available, and taking one or two of them can help you to hone your proofreading skills and become a more proficient proofreader.