The bobbin thread will not pick up. The machine had jammed and I forced the wheel and can't get bobbin thread to pick up. When I thread manually, I only get holes, no stitches. Is it a timing belt?

Check your needle to see if it's bent---roll on flat surface to see if it roll correctly
on some sewing machines when the thread comes off the thread take up lever it can cause the machine to jam
also if the bobbin thread becomes tangled it can jam
check the bobbin area for lint or loose threads
try having a top thread tail & bobbin thread tail of 3-4 inches
try holding the top thread tail & turn the handwheel on the right side on the machine manually & put the needle down into the bobbin area & see if the bobbin thread will pick up that way