When performing handstands, elbow levers and other handbalancing exercises, the hands and wrists bear most of the burden. For this reason, it is important to warm them up properly before your handbalancing practice.
In the video below, I demonstrate six simple warm-ups you can perform for your hands and wrists before beginning your practice:
I recommend performing each of these movements 10-15 times in each direction before beginning your handstand training. Also feel free to perform additional reps while you rest in between efforts.
The exercises in the video go by fairly quickly, so you may need to watch it a few times.