If this helps at all, which it might not, but here you go anyways. When you speak, force your lower jaw bone out slightly, which should help you round out and lift your vowel sounds to the breathy, regal, native tone. When you have that mastered, practice in a mirror so it doesn't look so awkward.
Posture could also be a factor. Notice how they carry themselves, and try to copy. If you have a musical ear, it should just come to you. No worries, just keep practicing and people-watching.
Ask a native friend to help you. If they think it is silly, find someone else, or do it on your own. Sometimes the natives find it offending if you try too hard and it comes out funny, especially if you've been speaking a different accent when you met them. <- Of course this is not always the case, I only put it there for courtesy's sake.
Good luck!
Posture could also be a factor. Notice how they carry themselves, and try to copy. If you have a musical ear, it should just come to you. No worries, just keep practicing and people-watching.
Ask a native friend to help you. If they think it is silly, find someone else, or do it on your own. Sometimes the natives find it offending if you try too hard and it comes out funny, especially if you've been speaking a different accent when you met them. <- Of course this is not always the case, I only put it there for courtesy's sake.
Good luck!