I feel the Letter Sounds are the most important step of learning to read. If a child does not know his/her letter sounds, he/she cannot sound out or blend sounds. It is important for a parent to be able to help their child sound out words while reading together.
Here are some ideas for you to learn Letter Sounds:
Break up the Alphabet into small parts and practice saying the individual sounds the letters make. For Vowels you want to practice Short Vowel Sounds.
Start with the Letter Sound Video A-E. This video teaches the sounds of the letters: A, B, C, D, and E.
Then, watch Non-Musical Letter Sounds Video with all the sounds and then practice saying sounds aloud while watching the Non-Musical Letter Sounds without sound.
To further assist your learning of Letter Sounds, use the Letter Flashcards and as you see the letter practice saying the sound that the letter makes (Letter Flashcards).
Moreover, there are also free Worksheets for even more practice with Letter Sounds.