Fellow autistic here: clothes do indeed carry a lot of subtext about you, even if you don't intend for them to do so. We do not live in a value neutral world where clothes are purely utilitarian, and even utilitarian clothes (aprons, overalls, work gloves, etc) include connotations of social station (farming, service industry, manual labor -> common laborer, low social standing). Leather jackets carry a message of being physically tough. Tech CEOs all wear synthetic-fiber athleisure to show they're too busy/important to care how they dress, and now that style has become associated not with exercise but with wealth and disdain.

Knowing that dress has these constructs associated means you can alter how others perceive you. Being autistic isn't ever easy but being a well-dressed autistic person buys you some grace. Derek Guy is a lib but he's got a lot of very useful posts about the history of clothing items and where their social associations came from, helpful if you're a gestalt learner.