I kept messing up in a Ukulele lesson years ago.
The angrier I got, the more pathetic my rendition of "Three Little Birds" became.
That's when the instructor said something that changed my life.
"You're going too fast."
*Insert me grinding my teeth and cursing my fuddly fingers
"Practice it slow first," he said. "That's how you develop the skill to play fast."
I improved almost instantly.
And the more permission I gave myself to focus on playing correctly (instead of quickly), the more competent and confident I felt in my ability to keep making progress.
These days, I'm acutely aware of mistakes caused by hurrying, which has little benefit as far as I can tell. Haste, sure. But hurrying? Meh. Hustling? At my age?!
No thanks.
I've learned the fastest way to do things fast & well is to first do them slowly & sufficiently.
Tying your shoes.
Writing a paragraph.
Learning an instrument.
Why bang bum notes for no good reason or reward when a little patience would allow you to make real music sooner?
You have time to go slow as long as you do not stop.