To edit the SEO for the Events landing page go to Entries > Singles > Events Landing Page. Here you can update the SEO tab for the landing page.
The hero for the events landing page is also updated in this entry.
Add new events by going to Entries > Events.
Adding events works much like other sections. fill in the fields for each event including the start/end day and time for each event and the add in the main copy with the event content builder field.