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look up slime tutorials. bootleg musicals exist online. I can send you some. Movie musical adaptations and stage recordings also exist. Some of them are actually very good.
(OH FUCK NO DON'T WATCH THE MOVIE ADAPTATION OF THAT ONE IT'S FUCKING AWFUL-You want the original cast recording of that one. Bernadette Peters is in it and she's a fucking goddess. I guarantee you you can find it online. Good movie ones are Moulin Rouge, Rocky Horror Picture Show(But you're not old enough for that), Little Shop of Horrors, Chicago, Hairspray, and Cabaret. Oh and Sound of Music, duh!)