Round your lips into a tight circle. Lift the back of your tongue toward the soft palate and add voice.

Americans pronounce weekdays as WEEK-dayz (/ˈwikˌdeɪz/). Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "I shower quickly on weekdays but take my time on weekends".
Record yourself saying "weekdays" and play it back. The mic stays on your device — nothing's uploaded.
2 syllables, 6 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
Round your lips into a tight circle. Lift the back of your tongue toward the soft palate and add voice.

Pull the corners of your lips back slightly. Arch the middle-front of your tongue high toward the roof of the mouth.

Raise the back of your tongue to touch the soft palate (velum). Stop the air, then release.

Touch the tip of your tongue to the roof of your mouth just behind your teeth. Add vocal cord vibration as you release.

Start with your jaw slightly open and the front of your tongue forward and slightly up. Glide upward, your jaw closes a little more and your tongue arches higher toward the roof of the mouth.
Same position as S, but add vocal cord vibration. Feel the buzz.

The textbook way isn't wrong — it's just not how anyone actually says it.
In "weekdays", the "d" is not released — the articulators get into position but hold without the burst of air. Air stops but there's no release burst — the articulators hold position.
Stress falls on the first syllable, not the others. Stretch WEEK — keep everything else short and quick.