Think I’m starting to get the hang of this

I've been following this recipe from farmhouse on boone:
475 g AP flour
100 g active bubbly starter
325 g water
10 g salt

Mix all ingredients, rest for 30 mins. 3 sets of stretch and folds every 30 mins. BF on counter until doubled (Ithink I left it around 9hrs). Shape and transfer to floured tea towel lined bowl, cover and leave in fridge overnight (I did about 13 hrs)
Bake in preheated dutch oven at 500 for 20 mins, lower temp to 475, remove lid and bake another 15-25 until golden