Here's what I do and turn out a pretty good sourdough loaf every week.
1. Take starter out of fridge and allow to return to room temperature. It will start to bubble when it is ready.
2. Measure 500g of bread flour into a mixing bowl (my go-to brand is Dove's Farm, but sometimes I use Lidl's own brand and sometimes I mix in a little rye flour or smoked wholegrain flour)
3. Add 1.5 tsp of salt and mix
4. Add 60g of starter and 375g of water (sometimes a little less depending on humidity) and mix well.
5. Cover with clingfilm or place in a plastic bag and secure with a clip
6. Leave to prove overnight for about 18 hours
7. Remove from bowl onto floured service and stretch and fold over a few times (I fold both edges into the middle, and then in half again, if that makes sense)
8. Place in well floured basket, cover with tea towel and leave to rise for 2-3 hours.
9. Place a Le Creuset cast iron pot with lid in the oven turned up to its highest temperature and allow to heat up for 30 minutes
10. Place dough in pot and put the lid on, return to oven and switch temperature down slightly to about 220C
11. After about half an hour, remove the lid and switch the temperature down again. Let cook for another 20 minutes or so.
This method will give you a fantastic crust, and it's a pretty easy technique once you get the timings right. You will also get a nice open texture and a glossy, chewy crumb.