Some time spent on situational conversation would great. As well as learning what native speakers say versus “book phrases” (of course local slang is a factor). But never have I ever been told that it's very common for someone taking your order to just say “dime”. But i hear that all the time in El Paso. Most of my practice with native speakers is ordering food, and theres a good amount i still have a hard time understanding just since the way they say things isnt “by the book”. Maybe in some meetings doing restaurant, grocery store checkout, clothing store, market etc speaking situations to help with those real world situations??