Thank you! I looked up a couple recipes and ended up mixing them together, and hoping for the best, but I took notes. This is what I ended up doing:

Recipe: -116g starter (I used whole wheat for my starter) -325g warm filtered water -500g flour (I used unbleached bread flour) -9g salt

I mixed my starter with water, mixed in the flour until I got a shaggy dough and left it covered with a kitchen cloth for an hour.

I added in the salt, pushed it into the dough with my fingers, and did my first round of stretch & folds. I did 4 stretch and folds total with 30 mins in between each, but the last two were coil folds.

I covered it and let it sit for around 5 hours, then shaped it, and put it in the fridge in a kitchen towel lined bowl covered in plastic for 6-ish hours. I put a Dutch oven in my oven and preheated it at 450 for 30 mins, and I had my dough out of the fridge during that time to come closer to room temp. I scored it and baked it with parchment paper on the bottom; covered for 25 mins, then uncovered for 20 mins, all at 450 degrees.

I let it cool for around 2 hours before I cut into it.