I only prefer self checkout when I’m buying rubbers and lube. Anything else I’d rather have the checkout person scan and bag for me.
If you have social anxiety, the checkout person conversation is one of the easiest interactions for you to practice those skills on. “Hello, here are my items, thank you” is about the gist of what’s necessary.
Well I hope you use cash for all purchases and wear a mask that covers your face, otherwise everything you bought is recorded along with your identity in the store systems and potentially sold to 3rd parties like advertising companies, maybe to your health insurance company too.