Yes, it is basically like that. The two videos linked post above are quite descriptive. Most probably you added a blank or tab at the end of the message, that' s why I suggested to put it in a 'code' block.

Please note that address signing is something you need to master for this group buy. Being it to refund the chips or to enter your shipping address - everywhere where you need to prove you are the rightful owner, you need to sign. So it is not a waste of time to learn it now