I am 71 yrs old and have a flight scheduled in a while. I have a fractured ankle and I was wondering what accommodations I will need because for now I am also wearing a boot.

Exactly, depending on what you need you can request to your seat or just to the door or gangway. Many airlines have made it available to request online. Just look up your booking on the airline's site and find special assistance.

You need to request Curbside assistence to the airline, they will help you thru the whole process until you being seated in the aircraft.