I've been learning Japanese for a short while, and it uses some sounds that aren't in my native language (English). (For example, the "r" sound, which has been described to me as a combination of "d", "l", and the Spanish "r")
I know few native Japanese speakers; how can I make sure I'm pronouncing this sound correctly?
In general, how can one ensure that they are not mispronouncing sounds that aren't in their native tongue without a native speaker present?