vanginney,
Love the upside down pic.
Tilt the machine back on it's hinges and follow the feed dog drop controls from the knob to the feed dogs. There will be a round pointy part that slides in a tube like affair. Oil it there. That is probably where it's gummed up.
You can buy dedicated left side straight stitch feet for your machine, and there is the old fashioned fabric guides that screw onto the bed and ... and ... Dritz still sells the magnetic ones too. I've seen them at JoAnns. Lots better than tape.
And again, I know you have trouble getting it up in Canada, but I do suggest Tri-Flow oil.
Joe