Hey Thomas,
As stated above, handstand is mostly about balance, control and stamina. No amount of linear, repetitious or isolated “muscle” exercises will build the continuity you need to raise your feet off the floor without kicking up, for example. That’s all about synergy: leverage, alignment and rotation, ultimately, awareness and control, and of course, breathing.
But there is one free-weight exercise I think is helpful, and that is just to raise two dumbbells overhead with straight arms, parallel to the frontal plane, and hold them statically for as long as you can while practicing your breathing. Feel how the weight loads in a spiral fashion, from the palms of your hands all the way down to your heels. Feel how it’s rotation in the shoulders that drives the weights upward against the compression of the ribs and abdomen with exhalation.
That spiral, or double-spiral, is the foundation of handstand that extends through the torso, hips and legs, all the way down (or up) to your toes. It’s only a shifting of weight and balance, and using the weight of your legs to raise the hips, so it’s more of a roll than lifting or pressing.
Try this: start with your feet as wide apart as you can, your toes turned slightly inside the heels. Place the heels of your hands about shoulder-width or slightly wider and inline with the tips of your toes, or an inch or two in front. Rotate your elbows and shoulders inward and drive downward against the floor, just as you did with the dumbbells, and raise only up to your tip toes…WITH EXHALATION! Contract your abs as you squeeze all that air out. That is your point of departure. Your next movement is an outward rotation, from the heels into the hips, WITH INHALATION, which carries the hips up. Visualize the point where your feet will come together overhead. Think only that you’re raising the room overhead. Don’t look down at the floor. Let the head hang down relaxed and look to where the wall meets the floor as your horizon. Once you’re up, you will find the relaxed head acts like a tail or rudder with which you can use to steer the body up and make slight adjustments in balance to stay there.
A common mistake with handstand is trying raise yourself up with exhalation. If you exhale on the way up, you’re contracting muscles that have to elongate and it will never happen, or if so, it’s only momentarily until you inhale again and fall.
There’s a little more to staying up, but that will come later. I hope that helps. It’s worth going for. Good luck!
siva