You should recieve a legal job descript
ion before you apply. This lists the essential functions of the job. On your application or hire papers, you will sign off that you can perform the essential functions of the job with reasonable accomodation for disabilities.
You talk to the hiring manager and state that you are disabled and what accomodations you need. You need to know in advance what accomodations you need.
For example, you know that you cannot work over 8 hours a week, you cannot take coworker's shifts. Maybe you need a set schedule and cannot switch days with other employees.
I've received accomodations in school and work:
Use of service dog
Flexibility in attendance (that was in school)
3 extra unpaid sick days per month
Complete control of work schedule (I can literally take a nap at work, or cross myself off the schedule for days.)
Set schedule - 1 extra day off a week
Bring child to work
Private work space
Music in workspace
I have always been lucky to have understanding people to work with. The university had it's own office for services for disabled students. They gave me a lot of confidence. I work for my fiance now, so I don't have to worry about this stuff and I've gotten the accomodations I need... and some extra stuff I want. :) Although it does cause some tensions because people didn't know I am disabled. I have a coworker whose son has binplar disorder, so she completely gets it. That's nice. One time she noticed I was "crabby" and made all my phone calls to clients for me that day. :)
If it seems hard, call your local disability office and ask for a "ticket to work". They'll take care of a lot of this stuff for you and it is competely clear to the employer what they need to do and that they MUST comply.
good luck!