I originally would look at J E Oneil’s blog because of her etymology studies. More recently, I took her up on being a beta reader.
I think she did a good job on my 121,000 word manuscript, The War of the Worlds and Fairies. She pointed out some typos (I didn’t know the British actually spelled the word “aluminum” differently) and a few unclear sentences. There were no comments where I thought she just didn’t get the plot or characters.
So you might take a look at her website, and if you get a good feeling, see if she has time to go over your manuscript.