HELP WANTED: Can this singer act..?

Hello Post Readers! I'm a trained classical singer who has never acted... ever! Not even High School Drama! I'd love to audition for some community theatre - but I'm lacking confidence! I'd like to get some stage acting classes to give me a few hints - just the basic stuff. I've googled and there are a few options in Perth. I'm wondering what is good... and what is better? Any recommendations? Suggestions? Happy New Years everyone :) Cheers Leah x