You can simply join a theater school like Rhode Island College located in Rhode Island. I t is one of the best places to study singing or acting since it is what they actually specialize in. Major in Bachelor of Arts program in theater as it offers concentrations in musical theater, design and acting in general. Check out http://www.ric.edu/mtd/theatreProgram.php.
There are a number of different acting schools in Rhode Island. Here are links to some of their websites: talentfactoryri.com triplethreatpacri.com tapaprovidence.org capachione.com dramakids.com modelntalentschool.com milfordpac.org