Yes, You are given options of check in times regardless of status, etc. The earliest lately seems to be 11:30. You do not need to enter any other information you can just choose your time. Then You can go back and finish the check in. It will save the info you put in. Once you complete check in your express pass is available. This is needed to board. You can print it out or save it to your Apple wallet. The day before your cruise you will need to complete the health questionnaire which is part of the check in process.