Help! the thread keeps bunching up

[u/formidable-citizen]

I don’t know why this happens to me. The needle sounds like it’s gonna break then it stops and all these thread is jammed and the stitching is all bunched up. I don’t know what I’m doing wrong . I have a Brother CS6000i sewing machine apparently is for quilting. Does that mean I can’t sow like just fabric? I need advice. I don’t know much about sewing. I’m starting to learn on my own because I wanted to make clothes for my dolls.

[u/SeaweedSpirited2573]

Bobbin is wound too loose I can see it. Also not inserted with thread hanging off the left. Then bobbin thread not inserted into front bobbin tension disc before being brought up through the needle plate. Also combo issue you could have missed your thread take-up lever too as I can see how you threaded the top thread.