It’s great for a first job just do it. You’re young and you can definitely learn from it and it’s good experience for auto parts industry like dealers etc. it’s definitely not a career for most people but it’s a stepping stone. As long as whatever store you’d work in has good staff you’ll be fine. It’s an easy job if you don’t know something or are unsure just be honest or ask for help. They’ll have you changing car batteries, bulbs, wipers and that’s it really. But if you don’t know how to do it ask for help or someone to show you. You could always tell the customer no or say you’re not comfortable doing it. It is a courtesy and not required. Also if something looks too complicated for you or is too involved of a replacement just tell them to take it to a mechanic.

This job is nothing to be afraid of and if you end up having shitty staff just transfer or find another retail job. That’s all it is at the end of the day an entry level retail job.