Thank you all very much for your replies and condolences. I was kind of afraid it might take more time than I have to learn it quick enough. She made a few quilts and things for my family and newborn, and I always thought they seemed pretty complicated. I think for now I'll just put off selling the machine and stuff unless money issues become a bit more pressing in the hopes that I'll get a chance to sit down and learn some things later. Like some of you mentioned, I think she would like the idea of her sewing equipment being put to use. Selling the stuff was one of the first things I thought of doing early on to try and cover some costs, but the more and more I spend time in the room she worked, the less I want to sell it.
Again, thanks for your replies, and I hope in the near future to be able to spend more time in these forums to learn somethings about quilting.