I realize this might be more of an accent question, but trying to master that American R sound, I don't quite know if I'm doing it correctly. That is, I sound very similar to the recordings I hear but my tongue is not exactly in the position the tutorial videos say it should be (lol that's a ridiculous sentence). They always say the tongue should be pointing to the aveolar ridge, and the back of the tongue should be squeezed between the back teeth while having a spoon-like shape in the middle. And while I manage to get it in this shape, in that position my r sounds more like a caveman's roar than an American accent.
I simply ask in Google how to pronounce a word or sound. "How to pronounce R" got me to Youtube and gave me this: LINK
This is not exactly how I sound, but I am a Canadian born to British expats.