I am sorry that you are having difficulty at your job, but I am glad that you are exploring your options and reaching out for help.
Let's approach your question from a different direction, though. You are not just a person with MS. You are a person with a unique combination of training, skills, interests, abilities, and experiences. In addition, MS can impact people in various ways. One person might experience primarily cognitive symptoms while another might experience primarily mobility symptoms, for example, which can mean very different job options. Realistically, there are some jobs that likely are going to be harder than others to maintain with MS. But as for your specific situation, you will want to look at what jobs you are qualified to do first. Then from that list of jobs, look at which ones will most likely be able to accommodate your symptoms. If standing is a problem, which jobs - that you are qualified to do - are more likely to be performed seated?
As for walking into a job with a cane: it is likely people will have questions about it. That is where it is important to know your rights so you can distinguish what you need to tell from what you want to tell from what you feel obligated to tell based on questions from others. Several of the earlier posts talk about your rights and responsibilities under laws such as the Americans with Disabilities Act or the Family and Medical Leave Act, and you can read more here:
Some people choose to disclose their disability right away, particularly when it's visible, so they don't waste time trying to work for a company that won't support them. Keep in mind, you are not obligated to do so unless you need accommodation for the hiring process, though. There are pro's and con's to disclosure (see more information about that in the link above as well), and you'll want to think about that ahead of time so you can practice how you want to answer questions that may be uncomfortable or even possibly illegal.
Finally, once you have looked at what jobs seem to be a good fit for your individual needs, and once you have learned about your rights and responsibilities in regard to discussing your MS, you can do research on specific companies to gleen information about whether they support a diverse workplace. Do they have diversity statements on their company website? Do you know whether people with disabilities work there? Do they participate in any disability awareness activities? Are you using your network to learn about what it is like to work there? Your network can really come in handy here to give you information about whether a company has a positive attitude about diversity.
I hope this will help you get started. Best wishes to you Josh!