One other thing Melanie. If you do drift off the line a bit on the inner or outer curve of a letter, you may be better off making the same error on the corresponding inner or outer curve rather than slavishly following the pattern. Symmetry is the important bit. But hang on, I just saw the "Joy to the World" you cut, so what's all this nonsense about being intimidated by letters? Fine letters are no different from wider fonts, they might even be easier. Get stuck in!
Rob