Congrats on the cat! Go to taxidermy.net and take a look at the list of taxidermy suppliers they have on there. WASCO is one of the major ones, as well as Van Dykes and McKenzie. All of them have home tanning kits that you can purchase for a beginner, do-it-yourselfer. I've never tried them, but once I get a few more pelts ready, I'll be ordering some.

Also, when you freeze the hide like you are doing, try and make sure none of the fur is touching the skin of the cat. Fold it over so it is all skin on skin and roll it up. Thaw it out and do this if you have to.
ArcticBowMan's Hunting Photo's