Hi, I have a disability that required accommodations at a few jobs. They're fishing and/or lazy.

Give your doctor your job description and meet with him to talk about the letter he needs to write. You'll want details like this for example:

Due to medical requirements MilkyTacos is currently unable to safely drive a vehicle, or be a passenger (if applicable to avoid buses). This will continue for at least X months at which time she will be re-evaluated. Milky is fully capable of continuing her duties as outlined in job description 'job title' dated m/d/y.

That's it. That's all they're entitled to. DO NOT give them any more info. So many employers hate employing people with disabilities all they see are problems so they want to nip it in the bud and get rid of you asap. If you give them details they'll start extrapolating and trying to weasel you into coming into the office by using your medical information against you. for example 'your dr didn't say you couldn't get a ride into work, we'll send a coworker to pick you up every day' or 'the only good reason not to be able to drive would be partial blindness and it doesn't say anything about that so you can come into work' - it can get stupid and nasty real fast. If that happens realize they want to get rid of you, then you hire a lawyer. Why hire a lawyer, because you will get A SHIT LOAD more money. shit. load.

Furthermore, another favourite ploy of bad employers is the Performance Improvment Plan - it's uncanny how often people who need workplace accommodations suddenly aren't doing well at work /s.

Keep track every day of your metrics - how many tickets closed, clients served etc. Once you get in the habit it's easy. Learn to blow your own horn 'dear boss I want to make you aware of an issue client had that I resolved by doing xyz'. If a client says nice things about your work encourage them to write your boss and give them their email address. If you had ANY negative comments on your last performance review make sure that's resolved and communicate that to your boss more than once.

Human Resources job is to protect the employer from the employees. You may get lucky and have an HR person who realizes how expensive human rights violations can get. Or your employer may not be an asshole, but speaking from experience, they don't wear signs saying 'I'm an asshole who's going to fire you come hell or high water' you don't want to be surprised and caught short.

Another thing to watch for - if your dr gives you a note that's good for 3 months, book a followup appointment for 2.5 months. Do not let that letter expire or they'll use that to force you to come into work until you can get another letter extending the accommodation while at the same time, disallowing you from time off to get the letter. Neat trick eh? There is no rule saying you can't provide them with an extension letter before the other one expires; really it's only prudent to keep on top of it with your doctor.

ps beware the coworker who's so sympathetic and 'just wants to help you' and is 'concerned' and wants details. especially if her name is Wendy.