Create your public address from the private key you received (the key from task 1). Cryptocurrency and virtual items will be sent to this 0x... address. Public address 0x... can be shown to everyone.
Look at the address you created for crypt, if there is one there, it means that someone is already using this address, make yourself another public address.
Create a button for accepting donations, in this example the translation is 1 Wei. Change to your created public address, if necessary change the amount of ether (in hex). The script does not work locally, must be uploaded to the Internet.