Like Mickey2 said "
MAke sure the bobbin goes in the correct way." Thread from bobbin should make almost a 180 degree bend to go through the slot in the bobbin case.
Also make sure the top thread is going through the tension discs properly. Have you taken the top tension apart? Was it put back together correctly? If you have the top tension at 8, that seems high. Again, as Mickey2 said, "should in theory be some where between 4-5 on the upper tension dial."
It looked like you did have the top thread going the right direction through the needle.
Do you have a manual? There are several free ones on the web including from
https://www.singer.com/support
Oh, just remembered, I had a machine that wouldn't make stitches and realized that I had released the presser foot pressure completely (it was a quick release).
Janey - Neat people never make the exciting discoveries I do.