How to find out what category.
Go to
www.dmoz.org - put the type of site you have in the search field (wood turning, fertilizer, labradoodle, etc). The search will bring up related categories. Visit the related categories and read the description. If your site fits the description criteria - you've found the right category.
To find out if a category has an editor - look at the bottom of the page. However, this won't tell you much. Most (99.999%) of the categories I edit in do not have my name at the bottom - most of those (98.999%) don't have anyone's name at the bottom.