How do you thread and install the bobbin on a singer 6251 sewing machine?

Put your spool of thread on the silver prong on the top of the sewing machine. Run the thread through the tensioner by following the arrows on the front of the machine (through the little clip at the top, down in the channel to the right of the 'auto tension', back up the other side of the 'auto tension', up to the top again, around the little groove there then down the other side of the groove). Thread the needle from the front then tuck the thread down and to the left so that it goes through the little channel on the foot. Then pull several inches of thread straight back. Wrap the thread once or twice around the little circular thing with the groove in it that is attached to the left side above the foot (sorry, I can't find my instruction book and I don't remember the name of that thing). Pull the metal plate back that covers the bobbin holder (the one with the little window in it) and put your bobbin in there with the stripes pointing up. Slide the metal plate back part-way so that the little arrow on the left of it lines up with the little arrow on the base of the machine. There will be a small gap where it is not closed all the way. Step on the pedal to run the machine and the bobbin should start to wind. You can look at your spool to make sure the thread is running. Keep an eye on the bobbin and don't wind it too full. When you have enough thread on the bobbin, let off the pedal, close the plate the rest of the way, unwind the thread from the round thing, and use something to sweep under the foot to draw the thread backward so that you pull about five inches of thread out the back of the machine. Trim all the ends of the threads so that you have two threads about 4" long--one coming from the needle and one from the bobbin. Then you're ready to go. Hope this made sense...and sorry if it was too much detail but I wasn't sure how much experience you've had with sewing.