Call your airline. Let them know that you require wheelchair assist through each stop. When you arrive to start your travels (hopefully someone will be accompanying you), if you can make it to your airline counter, there will be a wheelchair assist area it is well marked. If not right inside airport you will find a white courtesy phone, just lift phone and let them know you need a wheelchair. (Allow extra time at airport, if you must wait at the courtesy phone. At the start, an airport employee (usually company named Prospect), will take you through security ( you can request restroom break, or food), all the way to your gate. When airline starts boarding, an employee will wheel you up to the door of the plane. (If you cannot walk the aisle make sure when you call airline you note that you will need an aisle chair). Sometimes you will board before all other passengers. However, in 2020 and 2021, I've been boarded based on my assigned seat. Airlines board back of plane first to avoid close contact.
When you are ready to deplane, remain seated - you will be one of the last ones off the plane. A wheelchair will be waiting for you right outside doorway. If you need an aisle chair it will be brought directly to your seat. Once again, an employee (I've only seen Prospect as a company name, but there might be others) will wheel you to the next gate. Again, don't hesitate to ask for restroom or to stop and purchase drink.
Then you repeat for your final change of plane. When you arrive at MCO, they will take you to baggage claim, grab your luggage and escort you to Magic Express or other means of transportation.
When leaving MCO, if you are using MCO. If you have someone accompanying you, ask them to request assistance with any employee they see. There is no assistance at Magical Express drop off and does required time. (I still don't understand why), but once you get someone, you just repeat as above.
I've been fortunate to travel 9 times with Delta to MCO, and other than allowing yourself extra time (I request a Magical Express earlier pick up - instead of 3 hours, I ask at the resort for 4). With needing to wait for wheelchair assist and a pat down at TSA at MCO, that hour is used quickly.
While it is at your discretion, I do tip when I arrive at the gate. Depending on stops, etc is my tip based on.