Any advice on how to pronounce the letter R?

Hi everyone I'm 21 years old and I can't pronounce the phoneme R... I've seen videos on YouTube but they don't work.

I would be very grateful for your support since I was a child I have been teased for not being able to pronounce the letter R and that has made me a lonely person and afraid to socialize for fear of being teased.

Any advice on how to pronounce the letter R?
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