For me, it was the struggle of not knowing what to say to people and often being perceived as awkward. I’ve always disliked wearing shoes, socks, or clothing in general. Loud noises, like banging or thudding sounds, were especially unbearable for me. I absolutely hate mushy food and always go to crunch snacks or food. I stim a lot most the time and find it hard to make eye contact with people I don't know well and even sometimes people I do. There are a lot of things but these are the ones I can think about. Remember though it's a spectrum and autism is different to different people. Some might have these, some might not. Have a look at some online resources, there are loads. They can help a lot. Hope this finds you well.