Please help! Do I tell them I'm Autistic and about my sickness or no?

I recently got hired to be a teacher. The children would be young, and the only thing I'm worried about is that I'm Autistic ASF. I just worry that it might inhibit my ability to do my job accordingly. What if I don't pick up certain signals? What if I mess up and get overwhelmed at their screaming? What if I can't bond with them? There's just a lot of what ifs going through my head. I am so excited about this opportunity, and I really don't want to mess this up. I don't know whether or not to tell my employers as a precaution to potential liability. On the other hand, I'm slightly embarrassed of the diagnosis, and I don't want anyone knowing that about me. Another thing is I am extremely sick. I am unable to hold food or liquid down and experience episodes of nausea, and I almost pass out, and this occurs up to 30-35 times a day. I think I should let them know about that, but I don't want to be considered a hazard and then them fire me. Please let me know.
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People just make fun of it a lot
Please help! Do I tell them I'm Autistic and about my sickness or no?
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