New To Sourdough

Hey everyone! So I am fairly new to all this, ive wanted to get into baking bread for a long time and finally decided to! My sourdough starter has been doing great, I am on day 4 of it. However, I feel like Im messing up my dough that I make with the discard? Ive tried making foccacia with the discard and it poofed in the pan I was going to bake it in… but the bubbles I try to make will not stick. I assume I did something wrong when I kneaded the dough? I made two batches, one will not form bubbles. The other looks more promising but I dont understand the difference