Are you a little wobbly in the middle? Do you have an arch-y back with ribs that like to flare in your handstand, jacking up your line?
Use this complete handstand training session, demoed by Parishioner & Conclave alum Lizzie Steele, as a starting point. The goal is to practice maintaining connection between your shoulders, core, and hips.
This session is designed to be done in 30-60 minutes and focuses on finding a straight body line in handstand. I suggest watching the exercise, then pressing pause to do the exercises. You won't need any props for this workout.
This session mentions the "scap wrap." That is scapular elevation, protraction, upward rotation, & posterior tilt. Basically, you want your scapula to wrap around the outside of your rib cage and your armpits to face forward, not out to your sides.