Here is a blog by edureka itself. He has talked almost everything that one should know about Athena as a starter/fresher.
In the article you can find demo showing how to create a table in Athena and also how to work on the table. There is another demo stating the difference between MySQL and Athena.
https://www.edureka.co/blog/amazon-athena-tutorial
Hope you will enjoy the blog, as for me it was a treat to learn about the new tool.