I'm a bit of a newbie, and I love Nova's site too...April 1930s is a great resource also http://april1930s.com/
and this fb page has lots of "files" and videos that are super helpful, Carmon Henry will answer any questions you have. https://www.facebook.com/groups/SingerFWGroup/files/
The biggest tip I would give is that the take up lever has to be in the upper most position in order to remove the fabric, don't pull if it doesn't pull out easily, just move the handwheel slightly until the threads pull out easily.