I'm having a lot of trouble learning to roll "Р" (R sound). I can manage it - sort of - at the beginning of a word like Рыба, but really struggle to do it in the middle, especially for example words like Бутерброд.

If anybody has any exercises that can help me learn to do it, that would be most appreciated

If I can't get my tongue around it, is it a terrible thing if I'm only able to say the sound in the "English" way?

Thanks,
Lindsay