Hi Celeste. I have a very good video for you to practise. I hope it works for you. https://www.youtube.com/watch?v=Q_-Uho17D1g Saludos!

It's similar to when you pronounce "my favorite rock band". So when you find Twist R like perro. Remember "rock band" phrase it's a strong sound. Another strong sound is when you find a "rn" phoneme like Enrique (person name like Henry), enriquecer the sound in R is stong.

Rolling your Rs takes time and practice since it's a sound you're not familiar with. I have some good excercise for that if you would like to contact me. Hope you have an wesome day.