+1 to what the fellows have said above .... learn on a 12.5 to a max of a 14 foot rod. Longer than that and the rod will beat you to death.
Once you've got the basic timing of casts 'down' you'll find that applying that to a 'switch' is a rather easy process. There are a few casts (Snake Roll as an example) that are 'fumbly' (is that a real word?) with a short stick. But given all the other choices you have that's not a deal killer.
As an aside, what line weight/switch rod are you considering?