I would advise you to look through my six part tutorial in my gallery to answer all the basic questions. The techniques used for Twilight would be basically the same as the Celestia. If you still have questions after reading that, then I'd be more than happy to provide additional advice. Most questions I get are found there with pictures included.I would also need to know what experience you have and what types of clay you use to give the best advice I can.Best wishes.