Kato clay is very firm and hard to work with. I would suggest Premo clay, it is my clay of choice after working with polymer clay for over 24 years. Its a middle of the road clay, not too soft and not too hard. It works well for cane work too. You can find Premo wherever you find Sculpey 111 its made by the same manufacturer Polyform. Yopu are welcome to join us at http://www.craftylink.com
to ask questions, we always answer them. Good luck.