First sourdough loaf!

I baked my first sourdough loaf today and it turned out better than I expected for a first try.  Was really pleased!

recipe was from here - (have had some good loaves from this guy)

Sponge:

100g sourdough starter (mine is 100%)
100g water
100g flour

Dough:

460g flour
230g water
1 tbsp oil
1.5 tsp kosher salt

Mixed the sponge the night before and left it around 14 hours in the end.  Mixed all then left for 45 mins.  Slap and fold then back for another 45 mins.  Put in bowl to rise for another hour then into a hot (220) oven in a dutch oven for 30 mins then 5 with the lid off.

The dough was a bit odd and never seemed to go smooth enough.  After the last rise the dough looked under kneaded even though I hadn't kneaded it.  It also looked over proved and I thought it was just going to collapse when I put it in but it came out good.  Having said that the starter in the video is pourable and mine is definitely not!

The flavour is lovely but the inside could do with being a little chewier and the crumb is quite close from other loaves I've seen.  Tastes amazing though :D  Had a lot of help on this forum for this and it is much appreciated.