If you can’t do the longer White Umbrella, then, of course, you can do the shorter one.

Regarding the previous prayers, keep the Lion-faced Dakini and the Dharani of Compassion.

If you can’t do anything, keep your faith in Buddha. By doing so, then even if you die, you will reborn in a pure land, not in the sufferings of the lower realms. Keep the mind in bodhicitta and emptiness.