I have joined crowdfunding for military aid to Ukraine many times so far.
If you'd like military aid to Ukraine, you should watch this video and follow this process.
1. Click "Donate Now"
2. Click "Defence"
3. Click "Credit Card" or "Bank Transfer"
I guess most people will choose "Credit Card" for payment.
4. Input the amount of donation,
5. Input your credit card number, Expiry Date, and CVV2 or CVC2.
6. Click "Confirm The Payment"
7. After completing these six stages I mentioned above,
you have to input your payment password.
(ref: this process was not included in this video for personal security reasons)