Take a deep breath and slowly blow out.... relax
they aren't that terrifying...
1. Are there color on the tension knobs?
Yes? Is there a coordinating colored line or dots at each thread point? Yes? .... follow the colored lines or dots... = machine threaded.
NO?= open the manual and start with the far right thread and make your own dots with nail polish (bright hideous colors so they don't blend in ) after the polish has dried, follow your dots.