Allow guests to add entries to my database

I would like to display a schedule of events on one of my pages (ie: http://www.mywebsite.com/events )

For each event, this page would show several columns:
Event Date, Event Name, City, State, URL Link, etc.

This event page will quickly grow to show thousands of entries.

I would like guest users to be able to add new events to the list (or update the dates for the following year’s events). I would briefly review the user submitted content and then approve.

Can you please guide me in the right direction for the easiest and cleanest way of
1.) Allowing the users to submit the data, and
2.) Displaying this data on my events page.

(I’m fairly computer literate, but somewhat new to WordPress and don’t have much php or other programming knowledge.)

Thanks in advance.