Hi! On behalf of my Ukrainian friends and girlfriend, thank you for wanting to help.

Here is the official government portal for the war in Ukraine, with a variety of ways to help listed:

https://war.ukraine.ua/

If you’re okay with your donations being used for defensive and potentially offensive purposes, donating to Come Back Alive is one of the most impactful ways you can put your money to work. They post reports of what they do with donations as well:

https://www.comebackalive.in.ua/donate

As a techie, if you wish to donate your own time, there are communities you can join as well where you can have a significant impact. Depending where your skills are, you can help refugees and relocation organisations, for example. Personally, I’ve been learning Ukrainian for my girlfriend, and I’ve been helping and encouraging others to do so as well, including gifting language learning subscriptions — it’s another way to donate time to the country as it preserves a culture in danger and gets the Anglosphere closer to Ukraine (which will be especially useful post war)

Thanks for your answer, is there a need to rebuild Ukrainian cities communities and facilities, now or post-war? If yes, are there initiatives for it?

At some point, yes. Post war countries have a lot of potential, and with all the help behind it and the EU’s willingness to take it into the union, if Ukraine manages to retain its independence, it could become a thriving country within a few years of the end of the war.

Germany and Japan economies are one of the highest today 80+ years after WW2 but Iraq and Syria, not so much. Is there a framework or statistics by the way to monitor how a country's economy grow over time with all the significative parameters like discoveries or conflicts?

Is there a way for Ukraine to manage its independence virtually if the physical territory becomes Russian?

How does being in the European Union help rebuild practically or financially since EU has a debt issue and struggle to become autonomous in raw materials (any documents to refer) and if not in the EU, how do Ukrainians rebuild?

What components of a country stack can Ukraine government renew? for example, Estonia had no conflict to my knowledge but they upgraded their government stack to become an Internet-based country.

What economy does Ukraine?

Thanks @scrollaway. I donated to Come Back Alive.

How much? I’ll match your donation :)

$120 Kind of embarrassed, it might seems small to many HN users, but its a lot for me.

Matched! There is no need to be embarrassed, every little bit helps!