Hi . I have to admit I was going to post some links to information on workplace rights, but don't know how applicable they would be for your country. That said, I did find this South African educational booklet on Human Rights and Persons with Disabilities: https://www.sahrc.org.za/home/21/files/FINAL%20Human%20Rights%20and%20Persons%20with%20Disabilities%20Educational%20Booklet.pdf.
Also, on top of all of the other excellent information provided, I want to tell you that my wife, Kelly Mack (a contributor here), was diagnosed at age two, 45 years ago - before modern treatments, with the damage to show for it. She has used a wheelchair since her teens. She certainly has experienced discrimination, ableism and inaccessibility, but these experience pale in comparison to the way her chair and other assistive devices have opened up the world for her. They made her college education and much of her employment experience possible (she now telecommutes for work, but that did not used to be a thing and is still not always possible for some). They have also made traveling the world possible, which she loves to do. Many of the issues you describe, besides being major safety concerns are also serving to limit your mobility and make your world smaller. Assistive devices can help with that (as you can see, this is a topic I'm pretty passionate about).
I noticed that Jo mentioned the idea of a walking stick. I'm tagging another of our patient leaders because I know he has used a walking stick and may be able to offer some guidance.
Finally, Kelly just mentioned that you might be interested in looking up/reading about Eddie Ndopu, who is a South African disability rights advocate (she liked his book "Sipping Dom Pérignon Through a Straw" ) Hoping this information helps and please feel free, if you like, to keep us posted on how you are doing. Best, Richard (RheumatoidArthritis.net Team)