The process is pretty simple up until getting the universal interview which can be difficult to get ahold of them.
You will need a doctor's note so make sure that you tell the doctor the issues that you have similar as to what you have done here.
Create your profile on the IBCCES website/app. It has boxes that you select what issues you have and then two final boxes for do you need wheelchairs/elevators and if you can't stand in line. All of the answers you give are relevant.
In reality, it seems like it is the same as it was, but now they have a way to validate the needs through a 3rd party and streamline the process.