I coach youth racers and a strong start is surprisingly hard to teach. The best analogy I have found is to pretend you are diving into a pool.
When you dive into a pool, you hang your toes on the ledge of the pool and start falling forward. At this point in the dive you drop your butt a bit and DIVE in getting your head in front of your feet and exploding forward using muscle AND elastic components.
As the starter counts you down, roll up slowly on the knuckle under the wand. When you feel the tipping point, drop your butt and DIVE in. The last thing over the wand should be your feet.
If you feel like you are going to faceplant, you are doing it right.
The hard part is timing up the DIVE off the knuckle directly under the wand.
Try DIVING into your next start.