This is a great "first go" ! It's a fun target, and a bit challenging from Bortle 7 skies. (I have similar conditions -- typical suburban environment street/porch lights and big shopping centers nearby).
I'm still a novice at this stuff, but I think you've got better data here than it appears. 163 x 30s should be plenty for bringing out the main features of M57. I would suggest two things:
(1) Check your focus. Your stars seem just a little bit soft. I have a 102mm Maksutov-Cassegrain, and mine look similar, but that's to be expected for a small scope with a relatively large central obstruction. Maybe that's as good as you can get, I don't know. Just seems like an 8" scope should do better than mine.
(2) The main thing: You should look for some feature in your software called "photometric color calibration." You have a heavy blue-purple cast, and that's only because your histogram shows blues considerably brighter than reds and greens. Here's GIMP's histogram of your image, using a logarithmic scale to spread the color curves out:
I use Siril, and it has a feature for this calibration, wherein it compares your image with a standardized image on one of several different websites and adjusts your color curves accordingly:
I tend to use the "Simbad" online database, but probably others would work fine too. I suspect Deep Sky Stacker has a similar feature. I think once you fix that, you'll be happier with the image.
Looking forward to seeing more! Thanks for sharing!