This puzzle is for you to do on your own. I like these multi-level type puzzles and maybe you do too. If you haven't given your brain a good stir yet today, give this one a go!
Here's something that I noticed when I did the puzzle that, at first, made me think that I'd solved the puzzle wrong. I thought I'd share it for those who want to know. The spoiler doesn't give any part of the answer but it may clarify a certain assumed condition in the layout.
The fourth ring out has two boxes that are shared by four answer words. These two letters don't have to be unique
See the puzzle