practice like saying "route","rude","rare". it doesn't matter if you cant speak 'R' clearly. You should say it slowly. Good Luck!

haha, OMG... is easy to do it but I just can't find a way to explain it. just stick your tongue to the upper part (I don't know the name xD) but near to the teeth , then just release your breath, but calmed not fast.

hi im leaving massage right now , just to remind me to add u soon , im a native indo speaker and id like to help u and vice versa :)

Try this word, Indonesian People use this word to teach theirs kid to speak "R" clearly... "Ular melingkar-lingkar di atas Pagar Pak Umar"

You could practice it by using some words with r as a first letter such as ramai, rusa, rumah, rantai, and you can practice by saying rrr..... for few seconds. However don't worry about that even some natives don't pronounce it clearly.