Drop your jaw moderately. Touch the tongue tip behind the bottom front teeth and lift the mid-front part slightly toward the roof.

Americans pronounce edge as EHJ (/ɛdʒ/). You'll hear it in sentences like "The soldier dodged the edge of the ledge".
Record yourself saying "edge" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 2 sounds. Explore each sound's mouth shape and how it's made.