Est-ce que vous pourriez m'aider pour mon anglais. Je doit faire une lettre de motivation niveau 3ème. Merci !!!

Hi,
My name is (tu met ton nom) i'm 15 years old and i saw your ad in the newspaper. I would like to be waitress. I have all the requirements : i'm polite, i haven't any food allergies and i speak French and English very well. I'm available on saturdays and wednesday. I've already worked in a tearoom last year, that was great i enjoy it and i learn lot of things. I'm serious, hard worker and sympathetic.
Thanks
(tu met ton nom)
Pas sûr que c'est parfait mais c'est un bon début