Take a look in the gallery, I bet there aren't that many cards with handwritten wording, you can use stamps, peel-off, print off your own wording on the PC...
I love knitting too, don't get much chance now, that's really why I started card making. But saying that I am fast approaching 40!!! Have a look at some of the great designs around to see if that would sway you.
If you wanted to do something more along the line of needlecraft, you could even encorporate that into card making, cross stitch, hand embroidered, machine embroidered, applique, patchwork, quilting, can all be applied to cards, just keeps the size and time of the project smaller. Great, especially when starting out, or if time is limited.
Consider when and where you plan to do this "hobby." How much time do you have to spare, you don't want to be spending all your time setting up in preparation and have now time left to actually do anything.