I'm a dutch programmer working in a international team where English is the main language. In my native language I have pretty decent articulation. However, when speaking English I have a lot of trouble using words containing a 'r'. Most of the time I create a 'w' sound instead of pronouncing the 'r'. So words like rabbit will sound like 'wabbit', which makes me feel like I am narrating Tweety in his latest cartoon.
Are the any exercises I can do for better pronouncement of words with a 'r'. Thanks for your help.