I usually keep around 10% of the total photos for editing. After that, I do another round of culling and keep only the best.
I also follow a philosophy of "good enough". If left to my own devices, I would probably endlessly edit photos.
I edit a single photo for around 3 minutes. That way, I will not feel stuck.
After a lot of practice, I became better at culling in my head, before even taking the photos. This has shifted my relationship with photography to more of a cognitive exercise, with a different set of enjoyments. I take far fewer photos overall - often I go out with a camera and don't even take a single shot. Editing is more enjoyable because there's less to do and I already know what edits I want. It's less naively fun but more contently fulfilling.
If it doesn't catch my attention on my first culling pass, I just delete without regrets.