I need pronunciation help!!

[Quazar]

Can anyone suggest some exercises, online videos, or something that can help me learn how to roll my toungue? Words like "Arrosto" and "Vorrei" for example I just can't seem to roll my tongue right for the "R". Can anyone give me some suggestions please?

[ziggKogg]

What's your nationality?

[Quazar]

I'm American, why?

[ziggKogg]

Because its fair to say that the easy of rolling an R is dependent of your native language.
Anyway it's difficult to explain online, but I would say try growling but keep the tip of your tongue barely touching the roof of your mouth. Kind of letting it flap around your mouth, =P