In some words, like Arbeit, morgen, Universität and gern, the r should be pronounced as ʁ. But in fact, I can't hear any ʁ when listening to the pronunciation of these words. I think the ʁ might be omitted or pronounced as the vowel ɐ instead.
My mother tongue (Mandarin) does not have such sounds as ʁ or ʀ, so it is hard to produce these sounds for me. Using ɐ instead would make pronouncing words much easier. For example, the word lernst, with a ʁ followed by three consecutive consonants, is extremely difficult for me. (And when I listen to the pronunciation from my textbook, I cannot hear any ʁ, so I can never get it right...) However, I feel unsure whether it is okay to stick with ɐ.
So my questions are:
- Am I right that people tend to drop the ʁ or replace it with ɐ?
- I would prefer not to sound heavily accented, so how should I pronounce the r?
Edit: I've already searched fairly thoroughly all the questions here on the pronunciation of "r". There it's said that it's pronounced vocalic following a long vowel, but in the words listed above (Arbeit, morgen, Universität and gern) the r is preceded by a short vowel, and according to this page, it should be ʁ, not vocalic. But I indeed can't hear any ʁ, so that's my question.