What was your first Job?

Good ol' McDonalds.

If you mean dev job, I created a Discord bot for 20 dollars.

Blow...oh dev job? A simple website

Cashier in a DIY store

Cashier in a supermarket.

Then a year later I decided I should go back to school for CS.

I started as a backend dev, and i'm still at the same place.
First task, implement the booster shipping manager in a nightmare PHP legacy website .. Pure horror

Cutting grass in drainage system in the fields, nursery, assistant in the operating room, cook in a pub,.... And only then I got into the IT field as a linux/unix sysadmin.

So depends on the question, whether first job ever or just in it :)