Dear Sir/Madam,
My name is Ewan Argo. I am greatly interested in your project as I have extensive experience in this field.
I have previously written copy for websites and marketing material.
Data entry and compiling spreadsheets has been a big part of my professional life for many years and I feel confident in providing you with the service you require. For example, I had to research online for prospective clients, then contact them with marketing material outlining services offered then record all the information in a spreadsheet.
I look forward to working with you on this project.
Best regards,
Ewan