It is all a matter of feeling the ground before you embark. Now on to the technical side of e-mailing. The thought of the cost of the phone call is likely to make you rush and make mistakes. The text window, that the mail program provides, is inadequate for the job. It is small and provides little in the way of tools.
All word processors are far better suited to producing a decent letter, so use the features.
With the advantage of being able to see more of the letter's text, it becomes easier to check that you have covered all that you wanted to say and in the right order. When reading your e-mail the word processor is more suited to making things easier. The word processor also acts as a good E-Pal diary. You can maintain all your correspondence in a single document. Before sending a letter, you can append a copy at the bottom of the master document and then add your E-Pal's reply.