That looks pretty good!
If you decide to sand it, don’t do it too much and wear a mask. The particles that result from that sanding aren’t great.
There are some acetone based approaches too.
Personally I just don’t try to clean it up more than that, and if you really need the part to be pristinely clean, I prototype myself and then buy a final print from a professional 3D printing company.
It’s the most plug-and-play Linux has ever been from my experience.