Phonetically, Italian has very few vowel sounds, only 7, while English (RP) has 12. But italian vowels should always be clearly pronounced, with no slur or fade. Italian also relies a lot on their sound to avoid clusters of consonants, up to these cases:
AIUOLE = Flowerbeds 🌸
CUOIO = leather 💼
Although you may only read: A E I O U, actually these are the sounds you hear: