First...get a bottle of STOP-ROT. You will have burn on the ears and other areas from being frozen loosely. You want to wet the face and ears with the STOP-ROT as it thaws. This will rehydrate the burned areas and also give you time to do your skinning, fleshing and tanningwithout the worry of decomposition. Next time, you want to skin the head out immediately and roll it up with the ears and face in the center and squeeze all the air out of the bag, and double bag it before freezing.
The home tans work just as well as anything commercial. The difference is in the shaving, where alot of your time will be invested. Mounting a properly shaved skin versus an improperly shaved one is like night and day and you will enjoy mounting the one and pull your hair out with the other. By far the most foolproof and simplest home tanning method is Krowtann. I use it and Liqua-tan and McKenzie tan. The Krowtann has fewer steps involved.
You can flesh with a wire wheel on a drill in a pinch, and shave with a skife. You probably don't realize the work involved and that is why I agree with Magis in that you probably would be better served in sending it to a tannery. The deciding factor would be in how well you stick with the projects you start. I wish you plenty of luck.