Thanks KateM. Now where to start ????
Thought I might buy a cheap cake at the supermarket for a practice run?
as in a premade cake? You may find (depending on type and where it is from), that a purchased cake could be a bit too 'soft' or 'fluffy' to hold up the fondant and any other decorations you want to use. Just make sure if you buy one already made that it looks firm enough to hold together while you butter cream/ganache the cake and the put fondant on it. Might be easier to just buy a cheapie cake mix and use that instead.
In terms of fondant brands, I would go with Bakels. Loads of places sell it, and it is better (IMO) than the stuff you can buy in the supermarket.