Don't sweat it if any of this seems daunting. There will be more experienced editors at the edit-a-thon who can introduce & explain things. However, if you are adventurous, perhaps you can pick something on which you want to concentrate & read further.
Suggested sources
I posted a ½ dozen or so pre-vetted Google searches for sources for biographical articles that do not yet exist, at least at the time of this edit.
Wiki markup and Manual of Style
Help for using Wiki markup & the WP style guidelines:
Citations
How to cite sources & use citation tools & templates:
- Wikipedia:Citing sources
- Help:Citation tools
- Wikipedia:Citation templates
- makeref citation tool at WikiMedia Tool Labs
- WebRef, a JavaScript bookmarklet "automating the filling of the {{cite web}} template" from User:V111P
Infoboxes
Most biographies benefit from the use of an Infobox. Here is a Help page & the three most pertinent Infoboxes for this edit-a-thon:
- Help:Infobox
- Template:Infobox artist
- Template:Infobox playwright
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Template:Infobox musical artist (for Hallie Parrish Hinges, use
background=solo_singerparameter/value pair)