Any tips for preventing perfectionism when it comes to notetaking?
This question, combined with your previous one, makes me think that you are confusing two issues: transcribing information and understanding information. These are not the same thing.  In fact, if you focus more on transcribing information in detail, but you might actually learn less than if you had taken no notes at all.  See for example this article: https://www.scientificamerican.com/article/a-learning-secret-don-t-take-notes-with-a-laptop/
I think you need to break yourself of the habit of taking too many notes.  Here's what I suggest: read an entire chapter or lesson without taking a single note.  Don't write anything down at all, just focus on understanding the material.  Sit on your hands if you have to to prevent yourself from writing.  If you don't understand the material, read it again (or maybe look in a different book, find a relevant website etc,).  Once you think you have an understanding, try to summarize the entire chapter very concisely, for example just 10 bullet points.  if you can't do it that concisely, you probably didn't understand it.  Go back and read again.
After while, once you've broken yourself of the habit of taking too many notes, you can go back to taking a few short notes as you read.
Edit: To clarify based on Buffy's comment: I'm not suggesting this as a long term strategy.  Long term you need to find a balance with the right level of note taking.  I'm suggesting this as a short term (say a week or two) approach to get you out of the habit of excess note taking.