Lucky you! I probably could help you with the threading and reverse too. I have an old 50's Singer from my dh's grandma. It may not be fancy but it sure does work consistently.
The first time I used it I found that the flat side of the needle doesn't face the machine (right) but faces me. Also there's a lever for stitch length, this lever when pushed up while sewing does the reverse stitch. I know it's not a White but you never know...
-- Margie