I found a few similar questions, but none of them gave me the answer to this.
I'm a native Serbian, so I have problems understanding diphtongs, because Serbian has none of them. Serbian has only five vowels (/a/, /e/, /i/, /o/ and /u/), so it's much simpler than English to pronounce (at least considering vowels).
What bugs me, is that I hear diphthongs /eɪ/ (play), /aɪ/ (time), /ɔɪ/ (choice) as /ej/, /aj/ and /oj/ ; to be more specific, I hear them as monophtongs followed by semivowel /j/. Other diphthongs make make sense, and I both hear and pronounce as they are ( /oʊ/, /aʊ/ ...).
When I try to pronounce those as gliding vowels, it sounds really unnatural to my ears.
My question here is, should I continue to pronounce them as /ej/, /aj/ and /oj/ or should I practice to pronounce them correctly?