The ramp is a good place to get started and see how the operations work. You usually start off as a package handler unloading trucks and pallets then sorting into containers and stacking them so they can be loaded onto the airplanes. There are various jobs available at the lower levels you can go outside and work directly on the aircraft or you can stay inside and work the sort operations. You can become Dangerous goods trained or trained in various mechanical use. Forklift, Belt loader, Tug driver, Loader for containers. Past that going up in management or anything beyond the sort is difficult. Other opportunities are usually only in Memphis, maybe Oakland or Indianapolis. You can make a living with being a driver at the stations or some of the team lead positions. Also heavy weight operations.
Good pay, good benefits
limited advancement, hard job.