An easy way to create MLA citations is by using https://www.easybib.com/mla/source
NHD Requires you to create a Bibliography with a mixture of Primary and Secondary Sources. The sources need to be labeled and separated. Therefore if you use Easy Bib, create one Primary source page and one Secondary source page. This will automatically place the sources for each in alphabetical order for you under each category. Later edit them so that Primary sources are first followed by Secondary in one bibliography.
Sometimes it is hard to think of original sentence starters for your annotations. The List on the right can help.