Progressions:

• V-stand on floor (http://www.sensational-yoga-poses.com/images/downward-dog-heels.jpg)
• L-hold on a box or wall (http://flipfittraining.com/wp-content/uploads/2013/01/Nicole-L-Hold-Handstand-.jpg)
• Wall handstand (facing the wall)
• Wall handstand (back to the wall)
• Free handstand

Focus on keeping the body straight and hollow.

Use the 60 seconds table:
3 x 10 s
5 x 10 s
3 x 25 s
4 x 25 s
4 x 35 s
5 x 35 s
4 x 45 s
4 x 60 s
5 x 60 s