All the "U" class vowels are pronounced with an "oo" sound. The vav ofholam vav is a matres lectionis—it is not a consonant but acts as a vowel.
In modern Hebrew there is no differentiation in vowel length for kubuts and shuruk and the practice, called ktiv male (full spelling), always using shuruk has developed.
'U" class vowels are usually transliterated with the letter "u".
Practice. ...Putting things together.
Listen to and practice saying these consonant-vowel combinations. Each combination, whether open or closed, represents a syllable.
OPEN syllables
CLOSED syllables
Now for some real Hebrew words
WORKSHEET DOWNLOAD: Print your Hebrew
vowels
WORKSHEET
to accompany Lessons 8-13.HERE.