Mail Merge to PDF, attach to Gmail emails

I need a simple one or two click process to automatically generate and save PDF invoices, and send each one in an email attachment to each client. I have created a word 2010 doc complete with Mail Merge fields, which is linked to an excel spreadsheet. Both files are attached. The process is two steps: 1) Save the mail merge as individual PDF files 2) Attach and send the correct file in a personalised email within Gmail. I'd like to be able to do the process myself, so either if you can show me how it is done, or write some VBA code for me that would be great. Good english skills is a priority. I want this to be simple, so think about how you can simplify it as much as possible. I have basic VBA experience, but I want you to make it simple enough so that people can do it in 1 or 2 clicks. Ideally, all the PDF files will save in a single folder.