The R sound in english words is softer than in spanish, try to remark a little bit the R sound, and don't worry if it sound odd to you, you don't have to sound perfect in spanish. Bests from Mexico.

This video will show you how to pronounce "r" in Spanish. https://www.youtube.com/watch?v=6ahei-FL7EQ

https://translate.google.com/#en/es/buy%0A%0Aeat%20%0A%0Adie Copy/paste this link, and where theres is the translation in Spanish, click on the audio button (under 'morir', you'll see a little start followed by three other buttons, is the last one on the right, standard audio icon). Take care, Alejo.