Turn on the sewing machine.

Raise the presser foot lever.

Presser foot lever

Press (needle position button) once or twice to raise the needle.

Needle position button

The needle is at the correct height when the mark on the handwheel is at the top, as shown below.
Check the handwheel and, if this mark is not at this position, press (needle position button) until it is.
 

Mark on handwheel

 

Remove the spool cap that is inserted onto the spool pin.

Spool pin  Spool cap

Place the spool of thread onto the spool pin.

Slide the spool onto the pin so that the spool is horizontal and the thread unwinds to the front at the bottom.

Slide the spool cap onto the spool pin.

Slide the spool cap as far as possible to the right, as shown, with the rounded side on the left.

While holding the thread lightly with your right hand, pull the thread with your left hand, and then pass the thread behind the thread guide cover and to the front.

Thread guide

Pass the thread under the thread guide cover from the back to the front.
Hold the thread with your right hand so that there is no slack in the thread that is pulled out, and then pass the thread under the thread guide cover with your left hand.

Thread guide cover

Thread the machine by guiding the thread along the path indicated by the number on the machine.

Pass the thread behind the needle bar thread guide.

The thread can easily be passed behind the needle bar thread guide by holding the thread in your left hand, then feeding the thread with your right hand, as shown.

Needle bar thread guide