depends where you are you can and how far you want to go:

- Donate money to the red cross (Ukrainian Red Cross)

- Donate to the The Voices of Children Foundation

- and/or many more more: https://www.marieclaire.com/politics/how-to-help-ukraine/

- Get a car and go the Ukraine border with Poland and bring refugees to Europe (I see a lot of people doing it right now. Staying there by some train station with a "free transportation" sign)

- You can join the Ukraine foreigner legion https://www.theguardian.com/world/2022/feb/27/ukraine-appeal...