Annie,
Word is basically for writing letters. It is very difficult to publish a newsletter using Word. I would suggest using Publisher, which I have been using since version one came out in 1991. There are many other programs that you can use to publish a newsletter like In Design. However, for ease of use, I recommend Publisher to create your publication and converting to a PDF.
The majority of people using a computer already have Adobe Reader installed.
No matter what program you use to create your publication and PDF always be sure to embed the fonts you use. If you use a non-standard font and PDF the file (without embedding the font), the file might not look to the recipient at all like you created it. If you use a font that is not installed on their computer, that computer will substitute using a different font. Not all fonts are the same. Some are narrower, and some are fatter. This substitution can cause the text and graphics to change.
Judy Edwards