I am writing this short proposal to show my interest in your project.
Being a native teacher of Castilian Spanish and a proofreader with more than 4 years of experience, I believe I am the right candidate for your position.
Due to the holiday season currently I have sufficient time to do this project, and being a perfectionist I can assure you I will deliver it to the highest standard.
Please contact me if you wish to discuss further details of my application, I will be happy to answer all you questions.
Kind regards,
Clara del Rey