If you have Microsoft Office (possibly even a free alternative, like OpenOffice.org) you could just design the newsletter in Word and then 'publish' to a PDF, either the built-in tool (Word 2010) or a third party tool like CutePDF (where you 'print' the document to the PDF creator and then set a filename for it).
That would be the easier route, IMO, vs. learning to code HTML.
Are you asking for help in creation/distribution, or someone with a little experience in layout to make the graphics and/or text look nice? Or both?