on my machine I drop the full bobbin into the spot then I have to make sure the thread goes under a little clip near the front of the bobbin,
then pull the thread to the right. then close the plate and making sure the needle is threaded
turn your machine by hand while holding the bobbin thread, turn it one full revolution and the needle thread should pick up the bobbin thread. pull both threads to the back making sure the needle thread goes through the slot on the foot.