Not that you have to use the music but New River Train Nils Fredland compilation of Keith Blackmon's traditional singing squares is a great resource. Available through CDSS. It has music and calls along with notes. Theycare grouped by easy to more difficult, keepers or mixers. Since most bands don't know the tunes (Souix Souix City Sue; New River Train etc) I have been using the chance calls/templates and adding or messing up some of them.
The more I call them the more comfortable I get with hash calling a square or parts of one.
Good luck. Relax, fool around.
Mary "from Buffalo", not.