Thanks for the responses. I don't plan on having more than 20 articles for now (as these are high-quality articles on health topics that I hired a doctor to write so are fairly expensive). So if I publish every day, I will run out of articles in 3 weeks. What's the best publishing plan?
I didn't use WP, I usually just hand-code my sites with PHP. (I'm fairly comfortable coding and I like having 100% control, also my code is lightweight so it loads much faster than WP.) Basically, for this site I set up a system where I configure a list of articles, each article has a permanent URL and a release date. On the release date, the article shows up in the main index, and also shows up in the "related" section of previously published articles which are related.
So it's all set up and ready to go, I'm just a bit of a newbie in SEO so I'm trying to figure out what to specify as the release dates.