The two times I tried asking about a job in person, I was not an adult yet, and my mom helped me out... a lot. Anyway, one job I tried out was at the local rock climbing gym. It was busy, crowded, loud, and involved a LOT of social interaction with customers and nervous people climbing up the wall for the first time. I had a couple meltdowns in front of my boss (most embarrassing experiences ever) and eventually realized that I could not handle that much sensory input. I quit that job.
The other job I tried (which I also eventually quit) was at a garden center. My mom asked about employment for me, and then I talked to a manager there. He was very nice, and gave me a phone number. Later, they called, and I went in for a proper interview. Because I am super honest and did not know how to "sell myself" I told them that my last job was a fail, and that I am not very good with people (I didn't know I had autism at the time, but I knew I was lacking in customer relations). But they hired me anyway, and put me in the Annuals greenhouse, where I was put to work watering plants and pricing pots. My boss was very helpful, and slowly increased my responsibility and helped me to help the customers and not be so shy. I eventually quit the job because of autistic burnout, but it was great while I was there.
