You got me started watching a bunch of Cathedral Window tutorials, and I do like the look of the "traditional" one the best.
Here's one:
https://youtu.be/fO6Rb2N0_VU
I think I would do it all by machine - my eyes aren't what they used to be - cataracts, bleah - and I think I would baste the backing and batting onto the top so that when I sewed the curves down, the quilting would be done, too. Maybe even do only a few rows at a time.
Here's a lady that sews around the colored fabric by machine and it looks pretty.
https://youtu.be/1XqlIl99BjY
Just what I needed - another quilt on my bucket list, but that's what this board does!