Here's a breakdown:
* Start with your mouth open, as if you're saying the vowel sound in "ah".
* Then, slightly raise the front of your tongue, as if you're about to say the vowel sound in "eh".
* Keep your mouth open and relaxed, don't tense your jaw.
It's a short, open vowel sound.
Let me know if you'd like me to try and pronounce it for you, or if you have any other questions!