You can look online for sample proposals that you can work from, in many cases you will be able to download a template that you can work from. You will most likely find that there are dozens of sites offering hundreds of different templates to download. It may take a while, but you will find that there proposal forms that will match almost any need including yours. Take your time and select the one that best suits your needs.
The Nameplate and Masthead _ You must have a nameplate including the name of your publication and the date it is published. You should have a masthead too. Both nameplate and masthead are necessary. Your masthead lets people know the name of the author if your newsletter is personal or it says contact information if it's a company newsletter.