"A common mistake many folks make is placing the elbows too far apart in an effort to create a wider base. While it might feel like this would give you more balance, Ghandour says it actually throws off the proper alignment of a headstand — so keep those elbows tucked in line with your shoulders.
Also, remember that a headstand isn’t actually about balancing on your head. Instead, your weight should be in your arms and shoulders, and that requires a lot more control than you might think. “Often, yogis will kick up into the pose instead of using their core strength to get there,” Ghandour says. Remember, go slow and lift with control."