The useful first step at Orlando International Airport is to treat the airport's own transportation page as the source of truth. After baggage claim, follow current rental-car signs and keep the destination---MCO terminal-specific rental-car pickup---in view rather than navigating to an unrelated public address.
At MCO, confirm which terminal and rental-car level serve the arriving flight before moving the family and luggage. Use the airport's current terminal instructions and follow the agency signs once inside the rental-car area.
Before leaving the facility, confirm the agency's current hours, identification and payment requirements, vehicle notes, and return instructions. Photograph the vehicle condition and keep the official airport and agency pages available for the trip home.