u/Funny-Weakness-6227

I finally made my first bread. It’s quite sour and idk why. I searched online and it said I let it rest for too long? The recipe I followed that the first rest should be 8-12 hour which I did for 11 hours, then the second rest for 1 hour. The pictures I’ve attached are from a day after and the texture still doesn’t look like “bread”. After the initial bake I thought had thought maybe it’s under baked so I had put it in for an extra 20 mins