Departing from Cruise to WDW-Trying to get to parks asap


We are planning to disembark the cruise by taking our own luggage to try and save time and get off as early as possible. The itinerary for our cruise calls out debarkation time to be 7:30 am. Is this fairly accurate? We are hiring Happy Limo to take us from Port Canaveral to Pop Century in the hopes it’s a little faster than the Disney transportation, but I am unsure what time to tell them to pick us up. I originally asked for them to be there at 7:45 am, but now I am thinking that is too early for us to clear customs and am thinking of pushing the pickup back to 8 or 8:15. We are just trying to maximize our park time after the cruise. Thanks for any advice any of you can give!