How To Write A Hairdresser Cover Letter Writing A Cover Letter For My CV For A Libary Assistants Job! HELP!!!!?

Writing a cover letter for my CV for a libary assistants job! HELP!!!!? - how to write a hairdresser cover letter

Hello! This is the first to write a letter, and I have no idea how to start or what to share! I have sufficient knowledge on customer service and I used to be a hairdresser, so I'm used to a lot of customer service do not know what to write! All references, which in a letter as well? Thank you very much!