Please do not donate to Red Cross! They spend money on bureaucracy and photo ops of their leadership with Russian officials and are all around ineffective, e.g. bringing a truck full of water to a well functioning and protected Ukrainian city located on the biggest river in Ukraine. If you cannot or would not donate to the military, consider donating to the numerous effective Ukrainian humanitarian aid organizations, one example: Nova Ukraine [1]

[1] https://novaukraine.org/