For a long time this was one my least favorite methods to get into Handstand. I never felt like I had enough control and I'd end up cartwheeling instantly out of the posture. Now it tends to be my go-to approach, but it does require a lot of focus and control. It's a method I occasionally offer in my own group classes as most students can at least get a tiny sense of lift even if it's only an inch or two from the floor.

Handstand Swing & Hops

From a Standing Splits position:

Lift your standing heel as high as you can
Bend your standing knee enough so that your belly touches, or comes close to touching, your standing thigh
Be mindful to keep your pelvis as level to the floor as possible and turn your lifted hip down
It's not always necessary, but a slight gaze forward is helpful in most bodies
With your hands about shoulder distance apart, grip your mat with your fingertips and get ready to bear weight
Keep your arms straight and push your mat away from you
At the bottom of you exhalation (when your lungs are empty) use the power of your bent, standing leg to lift you up