I totally agree, Daeds, about the persistence thing. My personality is to be like a dog with a bone, and I think that accounts for a lot!
I do believe that the other thing is about continually learning CRAFT. I have been listening to a series of podcasts (https://storygrid.simplecast.fm) over the last 6 months or so and boy, have I learnt a lot.
My view is that the persistence is not only about ‘keeping on subbing’, but keeping on LEARNING. It’s the learning that continually takes our writing to the next level, and that one inch closer to success (however we define that)
FWIW, if you don’t know yet about obligatory scenes and conventions of genre, and the five commandments of story telling, I think you’re missing a trick. That’s how I was able to help Pinks out, and I believe it’s the reason that agent Sarah didn’t require any structural edits on the rewrite-from-scratch I sent her. You can learn about all that stuff via the above podcasts.