You asked me how I do my little inversions in the morning, here is a little video tutorial. Use a wall to feel more secure when you start. Headstands strengthen the abs and allow the blood to circulate well.
Last thing: roll your body back up gently after the inversion and head last.
Disclaimer: check your health with your doctor before exercising. You perform a headstand without supervision at your own risk. See a professional to give you advice. Claire Samuel will not be held responsible or liable for any injury or harm sustained if you try the exercise showed in this video.