You can check out the rough drafts of the pages I’ve finished up here.
The wiki page for Humans includes a basic summery of the setting theme.
Overall your races look good. The concepts are solid and diverse. I have no real critiques for you because we have discussed most of these races before. I did notice you didn’t touch too much on where changeling live, aside from in the water. Also I am curious what an all slaad settlement looks like.