Go to the dashboard
Pick add Add New under posts
type in your news item, add images etc
(you can change the titles as necessary or delete items if necessary from the Publish menu, to the left of Update Button)
Make sure you select the news category and they will come up in most recent item 1st
You can change the dates to change the order
You can uncheck the category News and check category News Archive to archive
You can click on the title of any news item
and click edit post in the top menu to edit
Note: as needed, we can set up any section with an archive section