Becoming an editor is not difficult.
Just write a decent application. We do not look for perfection, but show that you
- are capable of writing in the language of the category
- are able to find 3 websites as examples that fit into the category and are not already listed
- understand the guidelines about how to write titles and descriptions
- and most importantly are honest
Strangly the last is a very common reason why I have to reject applications.